Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Coraza (github.com/corazawaf/coraza/v3) versions 3.0.0 up to but not including 3.8.0 are affected. The JSON response body processor has no recursion limit, so a deeply nested JSON response can take roughly 12 seconds of CPU per 512 KiB body at the default settings. An attacker needs to get a backend to return such a body through the WAF, which requires response body access to be enabled. Upgrade to version 3.8.0 or later. The source gives no workaround.
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 |
|---|---|---|---|---|
| 5.9 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0039, the 33rd percentile, on 7 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