{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-121943 exists.","exposure":"","fix":"No fix has been published for CVE-2026-121943 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-121943 is a medium-severity vulnerability in irontec sngrep, published on 4 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-121943 and fix it if it is affected.\n\nWhat it is: CVE-2026-121943 is a medium-severity vulnerability in irontec sngrep, published on 4 Nov 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-121943 exists.\n\nAffected product: irontec sngrep. 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-2026-121943/ (Markdown: https://insights.sbomify.com/CVE-2026-121943/index.md)","id":"CVE-2026-121943","markdown":"https://insights.sbomify.com/CVE-2026-121943/index.md","name":"CVE-2026-121943","record":{"aliases":["DEBIAN-CVE-2026-121943","GHSA-v6rr-x6vh-q7q4","UBUNTU-CVE-2026-121943"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-170","name":"Improper Null Termination"}],"description":"Irontec sngrep through 1.9.0 contains an out-of-bounds stack read vulnerability in sip_check_packet and sip_validate_packet caused by an off-by-one length check on 10240-byte SIP payloads. Remote attackers can send a crafted UDP or TCP SIP packet or supply a pcap file to crash sngrep or leak adjacent stack bytes into displayed SIP fields.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Irontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packet","id":"CVE-2026-121943","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"sngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLV","id":"CVE-2026-121944"},"nickname":null,"packages":[],"prev":{"headline":"ZBar through 0.23.95 Out-of-Bounds Read via _zbar_sq_decode() in sqcode.c","id":"CVE-2026-121942"},"products":["sngrep"],"published":"2026-11-04","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-04","vendors":["irontec"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-121943/"}