CVE-2026-27018highCWE-22CWE-918

CVE-2026-27018: high-severity vulnerability in gotenberg

Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 1.7%
Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
gotenberg · gotenberg
Related CVEs — gotenberg

In the same product, most dangerous first.

CVE-2026-42589CRITICALGotenberg: Unauthenticated RCE via ExifTool Metadata Key InjectionEPSS 3.0%CVE-2026-40281CRITICALGotenberg vulnerable to argument injection via newlines in ExifTool metadata valuesEPSS 2.3%CVE-2026-40280HIGHGotenberg SSRF via case-insensitive URL scheme bypass in webhook and downloadFrom deny-listsEPSS 1.9%CVE-2026-42596CRITICALGotenberg: Unauthenticated SSRF via default deny-list bypass in downloadFrom and webhookEPSS 1.6%CVE-2026-55229HIGHGotenberg: SSRF via LibreOffice document processingEPSS 1.5%CVE-2026-45742HIGHGotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')EPSS 0.7%