Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Coraza (github.com/corazawaf/coraza/v3) versions 3.4.0 up to but not including 3.8.0 fail to set MULTIPART_STRICT_ERROR when a multipart request body is truncated, because io.ErrUnexpectedEOF is silently ignored. A remote attacker can send a truncated multipart body so that the strict-error rule (200003) does not fire, bypassing that defense-in-depth check for other multipart evasions. Upgrade to version 3.8.0 or later.
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 |
|---|---|---|---|---|
| 5.8 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0050, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV