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Advisory record · GHSA-jjwv-57xh-xr6r

Gotenberg has Chromium deny-list bypass via case-insensitive URL scheme (bypass of GHSA-rh2x-ccvw-q7r3)

CVSS 7.8 HighEPSS 0.017 · 77th percentile

Published by the GitHub Advisory Database at 30 Mar 2026, 16:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/gotenberg/gotenberg/v8Go<8.29.08.29.0
github.com/gotenberg/gotenberg/v7Go<=7.10.2No fixed version yet
Identifiers
GHSA-jjwv-57xh-xr6r · CVE-2026-27018 · GO-2026-4905
Weakness (CWE)
CWE-22 · CWE-918
Tags
Published
30 Mar 2026
Updated
8 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Gotenberg's Chromium deny-list can be bypassed with uppercase or mixed-case URL schemes, affecting github.com/gotenberg/gotenberg/v8 before 8.29.0 and github.com/gotenberg/gotenberg/v7 up to 7.10.2. An unauthenticated attacker who can reach the service can read files from the container. Upgrade the v8 module to 8.29.0; no fixed version is listed for v7.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.8 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.017, the 77th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:05 UTC First seen by agentprime
  2. 31 Oct 2026, 15:05 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.