{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27135 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-27135 is a high-severity denial of service vulnerability in nghttp2, published on 18 Mar 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-2026-27135 and fix it if it is affected.\n\nWhat it is: CVE-2026-27135 is a high-severity denial of service vulnerability in nghttp2, published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-27135 in the wild and no public exploit code.\n\nAffected product: nghttp2. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-27135/ (Markdown: https://insights.sbomify.com/CVE-2026-27135/index.md)","id":"CVE-2026-27135","markdown":"https://insights.sbomify.com/CVE-2026-27135/index.md","name":"CVE-2026-27135","record":{"aliases":["ALPINE-CVE-2026-27135","ALSA-2026:7666","ALSA-2026:7667","ALSA-2026:7668","AZL-80103","AZL-80219","AZL-80235","BELL-CVE-2026-27135","CLEANSTART-2026-CI31043","CLSA-2026-1777974095","CLSA-2026-1787303674","DEBIAN-CVE-2026-27135","ECHO-0b39-783f-9cd3","GHSA-6933-cjhr-5qg6","JLSEC-2026-5","MGASA-2026-0199","MINI-j53j-532g-vf6q","OESA-2026-1754","RHSA-2026:6190","RHSA-2026:7666","RHSA-2026:7667","RHSA-2026:7668","RHSA-2026:77939","RHSA-2026:8538","RHSA-2026:8539","RHSA-2026:8540","RHSA-2026:8541","RHSA-2026:8545","RHSA-2026:8546","RHSA-2026:8547","RHSA-2026:8548","RHSA-2026:8868","RLSA-2026:7666","RLSA-2026:7667","RLSA-2026:7668","ROOT-OS-ALPINE-315-CVE-2026-27135","ROOT-OS-ALPINE-320-CVE-2026-27135","SUSE-SU-2026:1056-1","SUSE-SU-2026:1074-1","SUSE-SU-2026:1247-1","SUSE-SU-2026:1350-1","SUSE-SU-2026:20833-1","SUSE-SU-2026:20870-1","SUSE-SU-2026:20925-1","SUSE-SU-2026:20950-1","UBUNTU-CVE-2026-27135","USN-8233-1","openSUSE-SU-2026:10437-1","openSUSE-SU-2026:20413-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"HTTP/2 library","requires_auth":"none","summary":"Attackers can cause a denial of service in applications using nghttp2 by triggering an assertion failure via malformed frames after session termination.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nghttp2","vendor":"nghttp2"}],"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-617","name":"Reachable Assertion"}],"description":"nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.","ecosystems":["AlmaLinux:10","AlmaLinux:8","AlmaLinux:9","Red Hat:enterprise_linux:10.1","Red Hat:enterprise_linux:8::baseos","Red Hat:enterprise_linux:8::crb","Red Hat:enterprise_linux:9::baseos","Red Hat:enterprise_linux:9::crb","Red Hat:enterprise_linux_eus:10.0","Red Hat:hummingbird:1","Red Hat:rhel_aus:8.2::baseos","Red Hat:rhel_aus:8.4::baseos","Red Hat:rhel_aus:8.6::baseos","Red Hat:rhel_e4s:8.6::baseos","Red Hat:rhel_e4s:8.8::baseos","Red Hat:rhel_e4s:9.0::baseos","Red Hat:rhel_e4s:9.2::baseos","Red Hat:rhel_eus:9.4::baseos","Red Hat:rhel_eus:9.4::crb","Red Hat:rhel_eus:9.6::baseos","Red Hat:rhel_eus:9.6::crb","Red Hat:rhel_eus_long_life:8.4::baseos","Red Hat:rhel_tus:8.6::baseos","Red Hat:rhel_tus:8.8::baseos","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 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","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"nghttp2 Denial of service: Assertion failure due to the missing state validation","id":"CVE-2026-27135","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":152,"n_references":2,"next":{"headline":"Invoking duplicate attributes can cause XSS in golang.org/x/net/html","id":"CVE-2026-27136"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/almalinux/libnghttp2","source":"ALSA-2026:7666"},{"ecosystem":"AlmaLinux:10","fixed":["1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/almalinux/libnghttp2-devel","source":"ALSA-2026:7666"},{"ecosystem":"AlmaLinux:10","fixed":["1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/almalinux/nghttp2","source":"ALSA-2026:7666"},{"ecosystem":"AlmaLinux:8","fixed":["1.33.0-6.el8_10.2"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/almalinux/libnghttp2","source":"ALSA-2026:7667"},{"ecosystem":"AlmaLinux:8","fixed":["1.33.0-6.el8_10.2"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/almalinux/libnghttp2-devel","source":"ALSA-2026:7667"},{"ecosystem":"AlmaLinux:8","fixed":["1.33.0-6.el8_10.2"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/almalinux/nghttp2","source":"ALSA-2026:7667"},{"ecosystem":"AlmaLinux:9","fixed":["1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/almalinux/libnghttp2","source":"ALSA-2026:7668"},{"ecosystem":"AlmaLinux:9","fixed":["1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/almalinux/libnghttp2-devel","source":"ALSA-2026:7668"},{"ecosystem":"AlmaLinux:9","fixed":["1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/almalinux/nghttp2","source":"ALSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/redhat/libnghttp2","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-debuginfo","purl":"pkg:rpm/redhat/libnghttp2-debuginfo","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/redhat/libnghttp2-devel","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/redhat/nghttp2","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debuginfo","purl":"pkg:rpm/redhat/nghttp2-debuginfo","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["0:1.64.0-2.el10_1.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debugsource","purl":"pkg:rpm/redhat/nghttp2-debugsource","source":"RHSA-2026:7666"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1.33.0-6.el8_10.2"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/redhat/libnghttp2","source":"RHSA-2026:7667"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1.33.0-6.el8_10.2"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-debuginfo","purl":"pkg:rpm/redhat/libnghttp2-debuginfo","source":"RHSA-2026:7667"},{"ecosystem":"Red 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Hat:enterprise_linux:9::baseos","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/redhat/libnghttp2","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-debuginfo","purl":"pkg:rpm/redhat/libnghttp2-debuginfo","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/redhat/nghttp2","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debuginfo","purl":"pkg:rpm/redhat/nghttp2-debuginfo","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debugsource","purl":"pkg:rpm/redhat/nghttp2-debugsource","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::crb","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-debuginfo","purl":"pkg:rpm/redhat/libnghttp2-debuginfo","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::crb","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/redhat/libnghttp2-devel","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::crb","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/redhat/nghttp2","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::crb","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debuginfo","purl":"pkg:rpm/redhat/nghttp2-debuginfo","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux:9::crb","fixed":["0:1.43.0-6.el9_7.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debugsource","purl":"pkg:rpm/redhat/nghttp2-debugsource","source":"RHSA-2026:7668"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:1.64.0-2.el10_0.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2","purl":"pkg:rpm/redhat/libnghttp2","source":"RHSA-2026:8868"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:1.64.0-2.el10_0.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-debuginfo","purl":"pkg:rpm/redhat/libnghttp2-debuginfo","source":"RHSA-2026:8868"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:1.64.0-2.el10_0.1"],"introduced":["0"],"last_affected":[],"package":"libnghttp2-devel","purl":"pkg:rpm/redhat/libnghttp2-devel","source":"RHSA-2026:8868"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:1.64.0-2.el10_0.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2","purl":"pkg:rpm/redhat/nghttp2","source":"RHSA-2026:8868"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:1.64.0-2.el10_0.1"],"introduced":["0"],"last_affected":[],"package":"nghttp2-debuginfo","purl":"pkg:rpm/redhat/nghttp2-debuginfo","source":"RHSA-2026:8868"}],"prev":{"headline":"Strimzi: All CAs from a custom CA chain consisting of multiple CAs are trusted for mTLS user autentication","id":"CVE-2026-27134"},"products":["nghttp2"],"published":"2026-03-18","related":[{"cvss_score":6.3,"headline":"nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length","id":"CVE-2026-58055","kev_date_added":null,"published":"2026-06-28"}],"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":"Red Hat","prefix":"RHSA"},{"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["nghttp2"]},"summary":"Attackers can cause a denial of service in applications using nghttp2 by triggering an assertion failure via malformed frames after session termination.","url":"https://insights.sbomify.com/CVE-2026-27135/"}