{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-17556 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-17556 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-17556 is a high-severity path traversal vulnerability in Github Enterprise Server, published on 5 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-2026-17556 and fix it if it is affected.\n\nWhat it is: CVE-2026-17556 is a high-severity path traversal vulnerability in Github Enterprise Server, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-17556 in the wild and no public exploit code.\n\nAffected product: Github Enterprise Server. 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-2026-17556/ (Markdown: https://insights.sbomify.com/CVE-2026-17556/index.md)","id":"CVE-2026-17556","markdown":"https://insights.sbomify.com/CVE-2026-17556/index.md","name":"CVE-2026-17556","record":{"aliases":["GHSA-h3g3-4265-wv56"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"GitHub Enterprise Server","requires_auth":"none","summary":"Unauthenticated attackers can delete arbitrary files and directories on GitHub Enterprise Server instances via path traversal in the X-GitHub-Request-Id header.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_P","cpe":[{"product":"enterprise_server","vendor":"github"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to delete arbitrary files and directories on the instance, including the entire user storage directory containing Git LFS objects, release assets, attachments, and avatars. The X-GitHub-Request-Id request header was used without sanitization as a filesystem path segment for the upload buffer directory, so a traversal value pointed the buffer at an arbitrary path and the deferred cleanup routine recursively removed the traversed target. Exploitation required only network reachability to the instance and no authentication, and it worked even when private mode was enabled. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.21.4, 3.20.6, 3.19.10, 3.18.13 and 3.17.19. This vulnerability was reported via the GitHub Bug Bounty program.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Path traversal in Enterprise Server","id":"CVE-2026-17556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"github:enterprise_server","products":["github:enterprise_server"],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Lm-evaluation-harness: lm-evaluation-harness: ssrf via job-spec model.url with bearer credential forwarding","id":"CVE-2026-17557"},"packages":[],"prev":{"headline":"WPvivid \u003c= 0.9.131 - Authenticated (Administrator+) SQL Injection via 'export_data' Parameter","id":"CVE-2026-17555"},"products":["Enterprise Server"],"published":"2026-08-05","related":[{"cvss_score":10,"headline":"Auth bypass in Enterprise Server","id":"CVE-2024-4985","kev_date_added":null,"published":"2024-05-20"},{"cvss_score":9.8,"headline":"Missing authorization in GitHub Enterprise Server","id":"CVE-2022-23739","kev_date_added":null,"published":"2023-01-17"},{"cvss_score":9.8,"headline":"Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE","id":"CVE-2022-46255","kev_date_added":null,"published":"2022-12-14"},{"cvss_score":9.8,"headline":"Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group","id":"CVE-2021-22869","kev_date_added":null,"published":"2021-09-24"},{"cvss_score":9.5,"headline":"Auth bypass in Enterprise Server","id":"CVE-2024-9487","kev_date_added":null,"published":"2024-10-10"},{"cvss_score":9.5,"headline":"Auth bypass in GitHub Enterprise Server","id":"CVE-2024-6800","kev_date_added":null,"published":"2024-08-20"},{"cvss_score":9.3,"headline":"GitHub Enterprise Server notebook viewer vulnerable to Server-side request forgery","id":"CVE-2026-77987","kev_date_added":null,"published":"2026-09-22"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-08-06","vendors":["GitHub"]},"summary":"Unauthenticated attackers can delete arbitrary files and directories on GitHub Enterprise Server instances via path traversal in the X-GitHub-Request-Id header.","url":"https://insights.sbomify.com/CVE-2026-17556/"}