{"answers":{"affected":"3 open source packages ship an affected version, including pyasn1. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23490 exists.","fix":"Upgrade pyasn1 to 0.6.2 or later.","what":"CVE-2026-23490 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23490 and fix it if it is affected.\n\nWhat it is: CVE-2026-23490 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 16 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23490 exists.\n\nAffected packages and fixed versions:\n- pyasn1 (PyPI): affected from 0.6.1; fixed in 0.6.2\n- pyasn1 (PyPI): affected from 0.6.1; fixed in 0.6.2\n- pyasn1 (PyPI): affected from 0.6.1; fixed in 0.6.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-23490/ (Markdown: https://insights.sbomify.com/CVE-2026-23490/index.md)","id":"CVE-2026-23490","markdown":"https://insights.sbomify.com/CVE-2026-23490/index.md","name":"CVE-2026-23490","record":{"aliases":["ALSA-2026:1903","ALSA-2026:1904","ALSA-2026:1905","ALSA-2026:1906","ALSA-2026:3354","ALSA-2026:3359","ALSA-2026:4146","BELL-CVE-2026-23490","CLEANSTART-2026-HB36492","CLEANSTART-2026-SZ54252","CLSA-2026-1774431305","DEBIAN-CVE-2026-23490","DLA-4463-1","DSA-6114-1","ECHO-8e45-690d-3026","GHSA-63vm-454h-vhhq","MGASA-2026-0020","MINI-crg5-hv84-x99w","MINI-frjp-8hfq-j942","MINI-fv46-gm49-5482","MINI-p834-79qr-96g5","MINI-rcv8-w337-8f7h","OESA-2026-1259","OESA-2026-1260","OESA-2026-1261","OESA-2026-1262","OESA-2026-1777","OESA-2026-1778","PYSEC-2026-1810","RHSA-2026:1903","RHSA-2026:1904","RHSA-2026:1905","RHSA-2026:1906","RHSA-2026:2221","RHSA-2026:2299","RHSA-2026:2300","RHSA-2026:2302","RHSA-2026:2303","RHSA-2026:2309","RHSA-2026:2453","RHSA-2026:2460","RHSA-2026:2483","RHSA-2026:2486","RHSA-2026:2712","RHSA-2026:2758","RHSA-2026:28042","RHSA-2026:3354","RHSA-2026:3359","RHSA-2026:4138","RHSA-2026:4139","RHSA-2026:4140","RHSA-2026:4141","RHSA-2026:4142","RHSA-2026:4143","RHSA-2026:4144","RHSA-2026:4145","RHSA-2026:4146","RHSA-2026:4147","RHSA-2026:4148","RLSA-2026:1903","RLSA-2026:1904","RLSA-2026:1905","RLSA-2026:1906","RLSA-2026:3354","RLSA-2026:3359","RLSA-2026:4146","ROOT-APP-PYPI-CVE-2026-23490","SUSE-SU-2026:0252-1","SUSE-SU-2026:0300-1","SUSE-SU-2026:0430-1","SUSE-SU-2026:20133-1","SUSE-SU-2026:20158-1","SUSE-SU-2026:20447-1","SUSE-SU-2026:20482-1","UBUNTU-CVE-2026-23490","USN-7975-1","USN-8134-1","openSUSE-SU-2026:20089-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python ASN.1 library","requires_auth":"none","summary":"An attacker can cause memory exhaustion and denial of service in applications using the pyasn1 library by sending malformed RELATIVE-OID data.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"pyasn1","vendor":"pyasn1"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.","ecosystems":["AlmaLinux:10","AlmaLinux:8","AlmaLinux:9","PyPI","Red Hat:enterprise_linux:10.1","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::highavailability","Red Hat:enterprise_linux:8::resilientstorage","Red Hat:enterprise_linux:9::appstream","Red Hat:enterprise_linux_eus:10.0","Red Hat:openstack:17.1::el8","Red Hat:rhel_aus:8.2::appstream","Red Hat:rhel_aus:8.4::appstream","Red Hat:rhel_aus:8.4::highavailability","Red Hat:rhel_aus:8.6::appstream","Red Hat:rhel_e4s:8.6::appstream","Red Hat:rhel_e4s:8.6::highavailability","Red Hat:rhel_e4s:8.8::appstream","Red Hat:rhel_e4s:8.8::highavailability","Red Hat:rhel_e4s:9.0::appstream","Red Hat:rhel_e4s:9.0::highavailability","Red Hat:rhel_e4s:9.0::resilientstorage","Red Hat:rhel_e4s:9.2::appstream","Red Hat:rhel_e4s:9.2::highavailability","Red Hat:rhel_e4s:9.2::resilientstorage","Red Hat:rhel_els:7","Red Hat:rhel_eus:9.4::appstream","Red Hat:rhel_eus:9.4::highavailability","Red Hat:rhel_eus:9.4::resilientstorage","Red Hat:rhel_eus:9.6::appstream","Red Hat:rhel_eus_long_life:8.4::appstream","Red Hat:rhel_eus_long_life:8.4::highavailability","Red Hat:rhel_extras_sap_els:7","Red Hat:rhel_extras_sap_hana_els:7","Red Hat:rhel_tus:8.6::appstream","Red Hat:rhel_tus:8.6::highavailability","Red Hat:rhel_tus:8.8::appstream","Red Hat:rhel_tus:8.8::highavailability","Rocky Linux:10","Rocky Linux:8","Rocky Linux:9","SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","SUSE:Linux Enterprise Micro 5.2","SUSE:Linux Enterprise Micro 5.3","SUSE:Linux Enterprise Micro 5.4","SUSE:Linux Enterprise Micro 5.5","SUSE:Linux Enterprise Module for Basesystem 15 SP7","SUSE:Linux Enterprise Module for Public Cloud 15 SP4","SUSE:Linux Enterprise Module for Python 3 15 SP7","SUSE:Linux Enterprise Server 12 SP5-LTSS","SUSE:Linux Enterprise Server 15 SP4-LTSS","SUSE:Linux Enterprise Server 15 SP5-LTSS","SUSE:Linux Enterprise Server 15 SP6-LTSS","SUSE:Linux Enterprise Server 16.0","SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15 SP4","SUSE:Linux Enterprise Server for SAP Applications 15 SP5","SUSE:Linux Enterprise Server for SAP Applications 15 SP6","SUSE:Linux Enterprise Server for SAP applications 16.0","SUSE:Linux Micro 6.0","SUSE:Linux Micro 6.1","SUSE:Linux Micro 6.2","openSUSE:Leap 15.6","openSUSE:Leap 16.0"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"pyasn1 has a DoS vulnerability in decoder","id":"CVE-2026-23490","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"debian:debian_linux","products":["debian:debian_linux"],"type":"denial_of_service","year":"2026"},"n_packages":1458,"n_references":3,"next":{"headline":"InvoicePlane has Unauthenticated Path Traversal in Guest Controller","id":"CVE-2026-23491"},"packages":[{"ecosystem":"PyPI","fixed":["0.6.2"],"introduced":["0.6.1"],"last_affected":[],"package":"pyasn1","purl":null,"source":"GHSA-63vm-454h-vhhq"},{"ecosystem":"PyPI","fixed":["0.6.2"],"introduced":["0.6.1"],"last_affected":[],"package":"pyasn1","purl":"pkg:pypi/pyasn1","source":"GHSA-63vm-454h-vhhq"},{"ecosystem":"PyPI","fixed":["0.6.2"],"introduced":["0.6.1"],"last_affected":[],"package":"pyasn1","purl":"pkg:pypi/pyasn1","source":"PYSEC-2026-1810"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-amt-ws","purl":"pkg:rpm/almalinux/fence-agents-amt-ws","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-apc","purl":"pkg:rpm/almalinux/fence-agents-apc","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-apc-snmp","purl":"pkg:rpm/almalinux/fence-agents-apc-snmp","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-bladecenter","purl":"pkg:rpm/almalinux/fence-agents-bladecenter","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-brocade","purl":"pkg:rpm/almalinux/fence-agents-brocade","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-cisco-mds","purl":"pkg:rpm/almalinux/fence-agents-cisco-mds","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-cisco-ucs","purl":"pkg:rpm/almalinux/fence-agents-cisco-ucs","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-drac5","purl":"pkg:rpm/almalinux/fence-agents-drac5","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-eaton-snmp","purl":"pkg:rpm/almalinux/fence-agents-eaton-snmp","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-emerson","purl":"pkg:rpm/almalinux/fence-agents-emerson","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-eps","purl":"pkg:rpm/almalinux/fence-agents-eps","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-heuristics-ping","purl":"pkg:rpm/almalinux/fence-agents-heuristics-ping","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-hpblade","purl":"pkg:rpm/almalinux/fence-agents-hpblade","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ibm-powervs","purl":"pkg:rpm/almalinux/fence-agents-ibm-powervs","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ibm-vpc","purl":"pkg:rpm/almalinux/fence-agents-ibm-vpc","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ibmblade","purl":"pkg:rpm/almalinux/fence-agents-ibmblade","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ifmib","purl":"pkg:rpm/almalinux/fence-agents-ifmib","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ilo-moonshot","purl":"pkg:rpm/almalinux/fence-agents-ilo-moonshot","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ilo-mp","purl":"pkg:rpm/almalinux/fence-agents-ilo-mp","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ilo-ssh","purl":"pkg:rpm/almalinux/fence-agents-ilo-ssh","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ilo2","purl":"pkg:rpm/almalinux/fence-agents-ilo2","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-intelmodular","purl":"pkg:rpm/almalinux/fence-agents-intelmodular","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ipdu","purl":"pkg:rpm/almalinux/fence-agents-ipdu","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-ipmilan","purl":"pkg:rpm/almalinux/fence-agents-ipmilan","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-lpar","purl":"pkg:rpm/almalinux/fence-agents-lpar","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-mpath","purl":"pkg:rpm/almalinux/fence-agents-mpath","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-nutanix-ahv","purl":"pkg:rpm/almalinux/fence-agents-nutanix-ahv","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-rhevm","purl":"pkg:rpm/almalinux/fence-agents-rhevm","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-rsa","purl":"pkg:rpm/almalinux/fence-agents-rsa","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-rsb","purl":"pkg:rpm/almalinux/fence-agents-rsb","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-sbd","purl":"pkg:rpm/almalinux/fence-agents-sbd","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-scsi","purl":"pkg:rpm/almalinux/fence-agents-scsi","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-virsh","purl":"pkg:rpm/almalinux/fence-agents-virsh","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-vmware-rest","purl":"pkg:rpm/almalinux/fence-agents-vmware-rest","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-vmware-soap","purl":"pkg:rpm/almalinux/fence-agents-vmware-soap","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["4.16.0-13.el10_1.2"],"introduced":["0"],"last_affected":[],"package":"fence-agents-wti","purl":"pkg:rpm/almalinux/fence-agents-wti","source":"ALSA-2026:1905"},{"ecosystem":"AlmaLinux:10","fixed":["0.6.2-1.el10_1"],"introduced":["0"],"last_affected":[],"package":"python3-pyasn1","purl":"pkg:rpm/almalinux/python3-pyasn1","source":"ALSA-2026:3354"}],"prev":{"headline":"Fields GLPI plugin vulnerable to RCE in dropdown generation","id":"CVE-2026-23489"},"products":["pyasn1"],"published":"2026-01-16","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["pyasn1"]},"summary":"An attacker can cause memory exhaustion and denial of service in applications using the pyasn1 library by sending malformed RELATIVE-OID data.","url":"https://insights.sbomify.com/CVE-2026-23490/"}