{"id":"CVE-2026-44829","title":"Gotenberg is a Docker-powered stateless API for PDF files","summary":"Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, filename handling in pkg/modules/api/context.go uses filepath.Base on Linux, which does not treat backslashes as path separators, so a multipart filename c…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L","cwe":["CWE-22"],"published":"2026-08-19","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:13:25.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44829","references":[{"url":"https://github.com/gotenberg/gotenberg/commit/93d0103585372433e18b351bb16edf4c383932d3","label":"security-advisories@github.com"},{"url":"https://github.com/gotenberg/gotenberg/issues/662","label":"security-advisories@github.com"},{"url":"https://github.com/gotenberg/gotenberg/releases/tag/v8.33.0","label":"security-advisories@github.com"},{"url":"https://github.com/gotenberg/gotenberg/security/advisories/GHSA-hwc4-gmrw-5222","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00372,"epssPercentile":0.30923,"ingestedAt":"2026-09-09T21:22:45.539Z","slug":"CVE-2026-44829","body":"## Overview\n\nGotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, filename handling in pkg/modules/api/context.go uses filepath.Base on Linux, which does not treat backslashes as path separators, so a multipart filename containing Windows-style parent directory components survives sanitization. The original filename flows through ctx.diskToOriginal and the multi-output PDF routes into archives.FilesFromDisk and archives.Zip.Archive as the generated zip entry name. A remote attacker can submit a name such as ........\\Windows\\System32\\evil.pdf through an upload or an upstream downloadFrom Content-Disposition header, and a Windows archive extractor can write the resulting file outside the intended extraction directory. The affected paths include /forms/pdfengines/split and other multi-output PDF, LibreOffice, and conversion routes, and exploitation can cause arbitrary file writes on a downstream Windows system when a user or process extracts the returned archive. This issue is fixed in version 8.33.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}