{"answers":{"affected":"3 open source packages ship an affected version, including code.gitea.io/gitea and gitea.dev.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58436 exists.","fix":"Upgrade code.gitea.io/gitea to 1.27.0 or later.","what":"CVE-2026-58436 is a high-severity denial of service vulnerability in Gitea Open Source Git Server, published on 13 Aug 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-2026-58436 and fix it if it is affected.\n\nWhat it is: CVE-2026-58436 is a high-severity denial of service vulnerability in Gitea Open Source Git Server, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58436 exists.\n\nAffected packages and fixed versions:\n- code.gitea.io/gitea (Go): affected all versions; fixed in 1.27.0\n- code.gitea.io/gitea (Go): affected all versions; fixed in 1.27.0\n- gitea.dev (Go): affected all versions; fixed in 1.27.0\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-2026-58436/ (Markdown: https://insights.sbomify.com/CVE-2026-58436/index.md)","id":"CVE-2026-58436","markdown":"https://insights.sbomify.com/CVE-2026-58436/index.md","name":"CVE-2026-58436","record":{"aliases":["GHSA-fw57-jgch-pgf3","GO-2026-6055","MINI-68qj-cqgp-8pjv","MINI-prj2-vpfp-8v88"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Git server","requires_auth":"none","summary":"Attackers can cause denial of service in Gitea by sending crafted Accept-Language headers to unauthenticated endpoints, triggering quadratic-time parsing.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Gitea","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests","id":"CVE-2026-58436","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Repository Visibility Manipulation via Git Push Options","id":"CVE-2026-58437"},"packages":[{"ecosystem":"Go","fixed":["1.27.0"],"introduced":["0"],"last_affected":[],"package":"code.gitea.io/gitea","purl":null,"source":"GHSA-fw57-jgch-pgf3"},{"ecosystem":"Go","fixed":["1.27.0"],"introduced":["0"],"last_affected":[],"package":"code.gitea.io/gitea","purl":"pkg:golang/code.gitea.io/gitea","source":"GHSA-fw57-jgch-pgf3"},{"ecosystem":"Go","fixed":["1.27.0"],"introduced":["0"],"last_affected":[],"package":"gitea.dev","purl":"pkg:golang/gitea.dev","source":"GO-2026-6055"}],"prev":{"headline":"Gitea LFS Deploy-Key Privilege Escalation","id":"CVE-2026-58435"},"products":["Gitea Open Source Git Server"],"published":"2026-08-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["Gitea"]},"summary":"Attackers can cause denial of service in Gitea by sending crafted Accept-Language headers to unauthenticated endpoints, triggering quadratic-time parsing.","url":"https://insights.sbomify.com/CVE-2026-58436/"}