CVE-2026-27018

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

HIGH
7.5
CVSS Score
Published: March 30, 2026 at 08:14 PM UTC
Updated: June 17, 2026 at 10:26 AM UTC
2 products affected across 2 vendorsGotenbergGotenberg

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.29.0
Affected range stops below 8.29.0, so it looks safe — our inference, not a vendor statement

References (4)

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22CWE-918

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