{"id":"CVE-2026-42592","summary":"Gotenberg: DNS rebinding bypasses SSRF validation on Chromium URL conversion routes","details":"Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, FilterOutboundURL resolves the hostname, checks the resolved IPs against the private-address deny-list, and returns only the error. It discards the resolved addresses. Chromium later performs its own DNS resolution when it navigates to the URL. An attacker who controls DNS for a hostname with a short TTL returns a public IP on the first query (Gotenberg allows) and a private IP on the second query (Chromium connects to the attacker-chosen internal address). The CDP Fetch.requestPaused handler re-checks the URL but runs its own DNS resolution, leaving a timing window before Chromium's actual TCP connect. The rendered internal service response returns to the caller as a PDF. This vulnerability is fixed in 8.32.0.","aliases":["GHSA-2pmr-289p-44r3","GO-2026-4990"],"modified":"2026-07-08T08:13:28.838850217Z","published":"2026-05-14T15:30:34.316Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42592.json","cwe_ids":["CWE-367","CWE-918"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42592.json"},{"type":"ADVISORY","url":"https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2pmr-289p-44r3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42592"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gotenberg/gotenberg","events":[{"introduced":"0"},{"fixed":"fe1b0020b8f211575559e6cf7e5ef6cc5a0545ca"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"8.32.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*"}}],"versions":["v8.31.0","v8.30.1","v8.30.0","v8.29.1","v8.29.0","v8.28.0","v8.27.0","v8.26.0","v8.25.1","v8.25.0","v8.24.0","v8.23.2","v8.23.1","v8.23.0","v8.22.0","v8.21.1","v8.21.0","v8.20.1","v8.20.0","v8.19.1","v8.19.0","v8.18.0","v8.17.3","v8.17.2","v8.17.1","v8.17.0","v8.16.0","v8.15.3","v8.15.2","v8.15.1","v8.15.0","v8.14.1","v8.14.0","v8.13.0","v8.12.0","v8.11.1","v8.11.0","v8.10.0","v8.9.2","v8.9.1","v8.9.0","v8.8.1","v8.8.0","v8.7.0","v8.6.0","v8.5.1","v8.5.0","v8.4.0","v8.3.0","v8.2.2","v8.2.1","v8.2.0","v8.1.0","v8.0.3","v8.0.2","v8.0.1","v8.0.0","v7.10.1","v7.10.0","v7.9.2","v7.9.1","v7.9.0","v7.8.3","v7.8.2","v7.8.1","v7.8.0","v7.7.2","v7.7.1","v7.7.0","v7.6.2","v7.6.1","v7.6.0","v7.5.4","v7.5.3","v7.5.2","v7.5.1","v7.5.0","v7.4.3","v7.4.2","v7.4.1","v7.4.0","v7.3.1","v7.3.0","v7.2.0","v7.1.1","v7.1.0","v7.0.7","v7.0.6","v7.0.5","v7.0.4","v7.0.3","v7.0.2","v7.0.1","v7.0.0","6.4.4","6.4.3","6.4.2","6.4.1","6.4.0","6.3.1","6.3.0","6.2.1","6.2.0","6.1.2","6.1.1","6.1.0","6.0.4","6.0.3","6.0.2","6.0.1","6.0.0","5.1.0","5.0.2","5.0.1","5.0.0","4.4.0","4.3.0","4.2.0","4.1.0","4.0.0","3.2.0","3.1.2","3.1.1","3.1.0","3.0.2","3.0.1","3.0.0","2.0.0","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42592.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}