{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-77205 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-77205 is a low-severity denial of service vulnerability in The Libreswan Project libreswan, published on 13 Oct 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-2026-77205 and fix it if it is affected.\n\nWhat it is: CVE-2026-77205 is a low-severity denial of service vulnerability in The Libreswan Project libreswan, published on 13 Oct 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-2026-77205 in the wild and no public exploit code.\n\nAffected product: The Libreswan Project libreswan. 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-2026-77205/ (Markdown: https://insights.sbomify.com/CVE-2026-77205/index.md)","id":"CVE-2026-77205","markdown":"https://insights.sbomify.com/CVE-2026-77205/index.md","name":"CVE-2026-77205","record":{"aliases":["DEBIAN-CVE-2026-77205","GHSA-7m29-c28j-rg7h","UBUNTU-CVE-2026-77205"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"IPsec implementation","requires_auth":"none","summary":"Attackers can lock out legitimate peers by sending bogus certificates that persist in the cache, causing denial of service in FIPS mode.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"libreswan","cpe":[],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-772","name":"Missing Release of Resource after Effective Lifetime"}],"description":"Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.","ecosystems":[],"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":"Denial of Service via sending bogus X.509 certificates","id":"CVE-2026-77205","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"IKEv2 pre-authentication Null Pointer Dereference in EAP code","id":"CVE-2026-77206"},"packages":[],"prev":{"headline":"Groups \u003c= 4.6.0 - Authenticated (Subscriber+) Privilege Escalation via 'groups_join' Shortcode","id":"CVE-2026-77203"},"products":["libreswan"],"published":"2026-10-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-16","vendors":["The Libreswan Project"]},"summary":"Attackers can lock out legitimate peers by sending bogus certificates that persist in the cache, causing denial of service in FIPS mode.","url":"https://insights.sbomify.com/CVE-2026-77205/"}