{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-113867 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-113867 is a critical vulnerability in Mozilla Thunderbird, published on 20 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-113867 and fix it if it is affected.\n\nWhat it is: CVE-2026-113867 is a critical vulnerability in Mozilla Thunderbird, published on 20 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-113867 in the wild and no public exploit code.\n\nAffected product: Mozilla Thunderbird. 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-2026-113867/ (Markdown: https://insights.sbomify.com/CVE-2026-113867/index.md)","id":"CVE-2026-113867","markdown":"https://insights.sbomify.com/CVE-2026-113867/index.md","name":"CVE-2026-113867","record":{"aliases":["DEBIAN-CVE-2026-113867","GHSA-7qpm-g2hw-rqrc","UBUNTU-CVE-2026-113867"],"analysis":null,"analysis_generated_by":null,"assigner":"mozilla","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"Thunderbird did not escape attribute values when serializing outgoing XMPP stanzas. Because values from incoming requests were echoed back in automatic replies, a remote XMPP user could send a crafted request that caused Thunderbird to inject arbitrary stanzas into the user's connection, which the server would then process as if sent by the user. This could be used to send messages or change contact and subscription settings on behalf of the user, without any interaction. This bug only affects Thunderbird's chat feature with XMPP accounts. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1.","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":"Stanza injection in XMPP chat","id":"CVE-2026-113867","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Uninitialized memory disclosure and out-of-bounds read in POP3 and SMTP NTLM authentication","id":"CVE-2026-113868"},"packages":[],"prev":{"headline":"Account password sent unencrypted during Exchange account setup","id":"CVE-2026-113866"},"products":["Thunderbird"],"published":"2026-10-20","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["Mozilla"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-113867/"}