CVE-2026-107826
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.1, readJSON in internal/bodyprocessors/json.go can stop its bounded flattening walk after reaching SecArgumentsLimit or the byte budget and then call gjson.Valid on the complete raw body. An unauthenticated attacker can submit shallow values followed by an extremely deeply nested JSON tail that was not visited by the bounded walk, causing gjson.Valid to recurse without a depth bound and terminate the hosting process with an unrecoverable fatal stack overflow. The ProcessRequest and ProcessResponse JSON paths share the affected readJSON validation flow, and the payload can remain within recommended body-size and argument-count limits. This issue is fixed in version 3.8.1.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-25)
- CWE
- CWE-674
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6gcq-wc29-5xf2 | Go | github.com/corazawaf/coraza/v3 | >=3.0.0 <3.8.1 | 3.8.1 |
| GO-2026-6693 | Go | github.com/corazawaf/coraza | all versions | no fix published |
| GO-2026-6693 | Go | github.com/corazawaf/coraza/v2 | all versions | no fix published |
| GO-2026-6693 | Go | github.com/corazawaf/coraza/v3 | >=3.0.0 <3.8.1 | 3.8.1 |