{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-122299 in the wild and no public exploit code.","exposure":"","fix":"No fix has been published for CVE-2026-122299 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-122299 is a high-severity vulnerability in jelmer dulwich, published on 4 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-122299 and fix it if it is affected.\n\nWhat it is: CVE-2026-122299 is a high-severity vulnerability in jelmer dulwich, published on 4 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-122299 in the wild and no public exploit code.\n\nAffected product: jelmer dulwich. 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-2026-122299/ (Markdown: https://insights.sbomify.com/CVE-2026-122299/index.md)","id":"CVE-2026-122299","markdown":"https://insights.sbomify.com/CVE-2026-122299/index.md","name":"CVE-2026-122299","record":{"aliases":["AZL-112720","DEBIAN-CVE-2026-122299","GHSA-6jv4-m4h7-2vv8","UBUNTU-CVE-2026-122299"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1250","name":"Improper Preservation of Consistency Between Independent Representations of Shared State"},{"id":"CWE-115","name":"Misinterpretation of Input"}],"description":"Dulwich before 1.2.20 contains a commit object parsing vulnerability where the read path in _parse_commit resolves a duplicate tree header to the last occurrence instead of the first, diverging from core git's resolution behavior, while Poetry 2.5.1 ships this version and uses dulwich by default for git dependency installation. Attackers can craft a commit object with two tree headers so that reviewers and CI using git see a benign tree while Poetry's dulwich-based checkout resolves to a different attacker-controlled tree containing malicious build scripts such as setup.py, resulting in unreviewed code execution on the install or build host.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Dulwich before 1.2.20 Commit Parser Tree Header Misinterpretation","id":"CVE-2026-122299","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Apache Roller: Limited weblog members can remove or change published entries","id":"CVE-2026-122300"},"nickname":null,"packages":[],"prev":{"headline":"Windows Kernel Transaction Manager Information Disclosure Vulnerability","id":"CVE-2026-122297"},"products":["dulwich"],"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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-11-09","vendors":["jelmer"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-122299/"}