{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-57191 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-57191 is a high-severity vulnerability in asterisk, published on 27 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-57191 and fix it if it is affected.\n\nWhat it is: CVE-2026-57191 is a high-severity vulnerability in asterisk, published on 27 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-57191 in the wild and no public exploit code.\n\nAffected product: asterisk. 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-2026-57191/ (Markdown: https://insights.sbomify.com/CVE-2026-57191/index.md)","id":"CVE-2026-57191","markdown":"https://insights.sbomify.com/CVE-2026-57191/index.md","name":"CVE-2026-57191","record":{"aliases":["DEBIAN-CVE-2026-57191","GHSA-589g-qgf8-m6mx","UBUNTU-CVE-2026-57191"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an unbounded `sscanf` in `res_pjsip_pubsub` when parsing the `MWI NOTIFY` `Message-Account` field may allow an unauthenticated attacker to send a carefully crafted packet that causes a stack buffer overflow and corrupts the underlying transport, permanently disabling all SIP functionality. An Asterisk restart is required to restore full operation. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.","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":"Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing","id":"CVE-2026-57191","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":15,"next":{"headline":"Asterisk: Out-of-Bounds Write in Codec2 Decoder Due to Floor/Ceil Sample Count Mismatch","id":"CVE-2026-57192"},"packages":[],"prev":{"headline":"Asterisk: SQL Injection in cel_pgsql and cel_tds via CELGenUserEvent eventtype Field","id":"CVE-2026-57190"},"products":["asterisk","certified-asterisk"],"published":"2026-10-27","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-27","vendors":["asterisk"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-57191/"}