Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Pomerium (Go module github.com/pomerium/pomerium) versions 0.32.6 up to but not including 0.32.8 are affected. On deployments using the stateless authentication flow, the unauthenticated callback endpoint decompresses attacker-supplied zstd data without a size limit, so an unauthenticated remote attacker can exhaust memory and crash the proxy. Upgrade to version 0.32.8, which contains the fix.
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0074, the 54th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV