{"affected":[{"defaultStatus":"unaffected","ecosystem":"golang","packageName":"github.com/gotenberg/gotenberg/v8","product":"gotenberg","source":"CNA: VulnCheck","vendor":"gotenberg","versions":[{"lessThan":"8.38.0","status":"affected","version":"8.31.0","versionType":"semver"}]}],"cveId":"CVE-2026-126799","cwes":["CWE-918"],"description":"Gotenberg 8.31.0 before 8.38.0 contains a server-side request forgery vulnerability in IsPublicIP() that allows unauthenticated attackers to bypass private-IP deny-list protections using IPv6 zone identifiers. Attackers can append a zone such as %25eth0 to the unspecified address or blocked IPv6 prefixes in downloadFrom, webhook, or Chromium/LibreOffice URLs to reach internal services and read responses in the returned PDF.","epss":{"date":"2026-11-12","percentile":0.37028,"score":0.00422},"exploits":[],"kev":null,"metrics":[{"score":6.9,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},{"score":6.9,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}],"modifiedAt":1794506133044,"publishedAt":1794430383948,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/gotenberg/gotenberg/security/advisories/GHSA-fqg9-x2xw-5crx"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/gotenberg/gotenberg/commit/8e850b1c932452627fba397f2005dd6fd57b9617"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/gotenberg/gotenberg/releases/tag/v8.38.0"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/gotenberg/gotenberg/blob/v8.37.0/pkg/gotenberg/outbound.go#L112-L142"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/gotenberg-8.31.0-before-8.38.0-ssrf-via-ipv6-zone-identifiers-in-ispublicip"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gotenberg/gotenberg/blob/v8.37.0/pkg/gotenberg/outbound.go#L112-L142"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gotenberg/gotenberg/commit/8e850b1c932452627fba397f2005dd6fd57b9617"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gotenberg/gotenberg/releases/tag/v8.38.0"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/gotenberg/gotenberg/security/advisories/GHSA-fqg9-x2xw-5crx"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/gotenberg-8.31.0-before-8.38.0-ssrf-via-ipv6-zone-identifiers-in-ispublicip"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/gotenberg/gotenberg/commit/8e850b1c932452627fba397f2005dd6fd57b9617"}],"revision":"b9ff20078d379114ac9c38f0bc67515430199a547554c89ef7fda649dd131e4c","sources":[{"modifiedAt":1794506133044,"name":"CNA: VulnCheck","retrievedAt":1794507024974,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126799"},{"modifiedAt":1794431803347,"name":"NVD","retrievedAt":1794443544902,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126799"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794507042457,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126799"}],"ssvc":{"assessedAt":1794500843798,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Gotenberg 8.31.0 before 8.38.0 SSRF via IPv6 Zone Identifiers in IsPublicIP","updatedAt":1794507042457}