{"answers":{"affected":"3 open source packages ship an affected version, including github.com/oasdiff/oasdiff.","exploited":"There is no known exploitation of CVE-2026-53508 in the wild and no public exploit code.","fix":"Upgrade github.com/oasdiff/oasdiff to 1.18.1 or later.","what":"CVE-2026-53508 is a medium-severity server-side request forgery vulnerability in oasdiff, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-53508 and fix it if it is affected.\n\nWhat it is: CVE-2026-53508 is a medium-severity server-side request forgery vulnerability in oasdiff, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-53508 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/oasdiff/oasdiff (Go): affected from 1.13.2; fixed in 1.18.1\n- github.com/oasdiff/oasdiff (Go): affected from 1.13.2; fixed in 1.18.1\n- github.com/oasdiff/oasdiff (Go): affected from 1.13.2; fixed in 1.18.1\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-2026-53508/ (Markdown: https://insights.sbomify.com/CVE-2026-53508/index.md)","id":"CVE-2026-53508","markdown":"https://insights.sbomify.com/CVE-2026-53508/index.md","name":"CVE-2026-53508","record":{"aliases":["GHSA-2jcc-mxv7-p3f9","GO-2026-5937"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenAPI diff tool","requires_auth":"none","summary":"oasdiff fails to enforce external reference restrictions when loading specs from git revisions, allowing attackers to read local files or trigger SSRF.","user_interaction":"required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-73","name":"External Control of File Name or Path"},{"id":"CWE-693","name":"Protection Mechanism Failure"}],"description":"oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through version 1.18.0, oasdiff did not enforce --allow-external-refs=false (library: openapi3.Loader.IsExternalRefsAllowed = false) when loading a spec from a git revision (the rev:path form, e.g. main:openapi.yaml). External $refs were resolved on that load path even when external refs were explicitly disabled, so the mitigation silently did not apply there. This issue has been patched in version 1.18.1.","ecosystems":["Go"],"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":"oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)","id":"CVE-2026-53508","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"@aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060)","id":"CVE-2026-53509"},"packages":[{"ecosystem":"Go","fixed":["1.18.1"],"introduced":["1.13.2"],"last_affected":[],"package":"github.com/oasdiff/oasdiff","purl":null,"source":"GHSA-2jcc-mxv7-p3f9"},{"ecosystem":"Go","fixed":["1.18.1"],"introduced":["1.13.2"],"last_affected":[],"package":"github.com/oasdiff/oasdiff","purl":"pkg:golang/github.com/oasdiff/oasdiff","source":"GHSA-2jcc-mxv7-p3f9"},{"ecosystem":"Go","fixed":["1.18.1"],"introduced":["1.13.2"],"last_affected":[],"package":"github.com/oasdiff/oasdiff","purl":"pkg:golang/github.com/oasdiff/oasdiff","source":"GO-2026-5937"}],"prev":{"headline":"Server-side request forgery in oasdiff-action","id":"CVE-2026-53507"},"products":["oasdiff"],"published":"2026-08-31","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-31","vendors":["oasdiff"]},"summary":"oasdiff fails to enforce external reference restrictions when loading specs from git revisions, allowing attackers to read local files or trigger SSRF.","url":"https://insights.sbomify.com/CVE-2026-53508/"}