Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Gotenberg versions up to and including 8.32.0 contain a flaw in the IsPublicIP check, which wrongly treats some IPv6 addresses (6to4, NAT64, and deprecated site-local prefixes) as public. An unauthenticated attacker who controls a DNS AAAA record may be able to reach internal destinations such as cloud metadata services, and the Chromium URL conversion route can return the response contents. No fix is listed; as a workaround, restrict outbound requests to trusted hosts or block these IPv6 prefixes at the network level.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0037, the 31st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:13 UTC First seen by agentprime
- 31 Oct 2026, 14:13 UTC Confirmed by OSV