{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44690 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-44690 is a high-severity vulnerability in Nlnetlabs Unbound, published on 22 Jul 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-2026-44690 and fix it if it is affected.\n\nWhat it is: CVE-2026-44690 is a high-severity vulnerability in Nlnetlabs Unbound, published on 22 Jul 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-2026-44690 in the wild and no public exploit code.\n\nAffected product: Nlnetlabs Unbound. 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-2026-44690/ (Markdown: https://insights.sbomify.com/CVE-2026-44690/index.md)","id":"CVE-2026-44690","markdown":"https://insights.sbomify.com/CVE-2026-44690/index.md","name":"CVE-2026-44690","record":{"aliases":["ALPINE-CVE-2026-44690","ALSA-2026:55784","AZL-92931","DEBIAN-CVE-2026-44690","ECHO-e154-63c5-79fe","GHSA-jwg4-375h-655h","RHSA-2026:55784","RLSA-2026:55784","ROOT-OS-DEBIAN-11-CVE-2026-44690","ROOT-OS-DEBIAN-12-CVE-2026-44690","UBUNTU-CVE-2026-44690"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"DNS resolver","requires_auth":"none","summary":"Attackers can poison DNS cache for sibling domains via RRSIG manipulation in Unbound, requiring aggressive NSEC processing enabled.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NLnet Labs","cpe":[{"product":"unbound","vendor":"nlnetlabs"}],"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:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field combined with premature cache writes during RFC 8198 aggressive NSEC processing leads to cache poisoning that permits a malicious actor controlling a single delegated zone to poison arbitrary sibling zones under NSEC-signed parent domains. A malicious actor with one registered domain under an NSEC-signed TLD can serve malicious insecure DNS responses for unrelated sibling domains (sharing the same parent zone). Arbitrary delegations that do not exist under the parent domain and are covered by the parent's NSEC chain can be brought into insecure existence by fraudulent wildcard DS records (less labels than expected, unknown algorithm) from the malicious sibling domain. This allows the malicious actor to inject insecure wildcard records for those delegations.","ecosystems":["AlmaLinux:8","Red Hat:enterprise_linux:8::appstream","Rocky Linux:8"],"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":"Cross-zone wildcard cache poisoning via RRSIG.labels manipulation","id":"CVE-2026-44690","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"nlnetlabs:unbound","products":["nlnetlabs:unbound"],"type":"other","year":"2026"},"n_packages":13,"n_references":1,"next":{"headline":"[Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions","id":"CVE-2026-44691"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"python3-unbound","purl":"pkg:rpm/almalinux/python3-unbound","source":"ALSA-2026:55784"},{"ecosystem":"AlmaLinux:8","fixed":["1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound","purl":"pkg:rpm/almalinux/unbound","source":"ALSA-2026:55784"},{"ecosystem":"AlmaLinux:8","fixed":["1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-devel","purl":"pkg:rpm/almalinux/unbound-devel","source":"ALSA-2026:55784"},{"ecosystem":"AlmaLinux:8","fixed":["1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-libs","purl":"pkg:rpm/almalinux/unbound-libs","source":"ALSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"python3-unbound","purl":"pkg:rpm/redhat/python3-unbound","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"python3-unbound-debuginfo","purl":"pkg:rpm/redhat/python3-unbound-debuginfo","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound","purl":"pkg:rpm/redhat/unbound","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-debuginfo","purl":"pkg:rpm/redhat/unbound-debuginfo","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-debugsource","purl":"pkg:rpm/redhat/unbound-debugsource","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-devel","purl":"pkg:rpm/redhat/unbound-devel","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-libs","purl":"pkg:rpm/redhat/unbound-libs","source":"RHSA-2026:55784"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound-libs-debuginfo","purl":"pkg:rpm/redhat/unbound-libs-debuginfo","source":"RHSA-2026:55784"},{"ecosystem":"Rocky Linux:8","fixed":["0:1.16.2-5.14.el8_10"],"introduced":["0"],"last_affected":[],"package":"unbound","purl":"pkg:rpm/rocky-linux/unbound?distro=rocky-linux-8\u0026epoch=0","source":"RLSA-2026:55784"}],"prev":{"headline":"[Eclipse Theia] Indirect Prompt Injection via Adversarial Workspace File and Directory Names in AI Chat","id":"CVE-2026-44688"},"products":["Unbound"],"published":"2026-07-22","related":[{"cvss_score":9.1,"headline":"Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY","id":"CVE-2026-81642","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":9.1,"headline":"Possible arbitrary code execution during DNSSEC validation","id":"CVE-2026-33278","kev_date_added":null,"published":"2026-05-20"},{"cvss_score":8.7,"headline":"Heap overflow with multiple NSID, COOKIE, PADDING EDNS options","id":"CVE-2026-42944","kev_date_added":null,"published":"2026-05-20"},{"cvss_score":8.7,"headline":"Crash during DNSSEC validation of malicious content","id":"CVE-2026-42959","kev_date_added":null,"published":"2026-05-20"},{"cvss_score":8.4,"headline":"CNAME synthesis could lead to heap corruption","id":"CVE-2026-82717","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":7.5,"headline":"Possible heap buffer overflow during DNSSEC canonicalization","id":"CVE-2026-81634","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":7.5,"headline":"Remote DNS-over-QUIC denial of service due to `quic-size` budget bypass","id":"CVE-2026-32665","kev_date_added":null,"published":"2026-07-22"}],"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":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"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":"2026-07-22","vendors":["NLnet Labs"]},"summary":"Attackers can poison DNS cache for sibling domains via RRSIG manipulation in Unbound, requiring aggressive NSEC processing enabled.","url":"https://insights.sbomify.com/CVE-2026-44690/"}