Answer in brief
CVE-2026-107826 records a High severity (CVSS 7.5) vulnerability in OWASP Coraza WAF: JSON body processor: argument-limit truncation reopens an unbounded-depth gjson.Valid stack overflow (process crash). The current sources do not mark it as known exploited. The current feed maps corazawaf/coraza (generic), github.com/corazawaf/coraza/v3 (go), github.com/corazawaf/coraza/v3 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps corazawaf/coraza (generic), github.com/corazawaf/coraza/v3 (go), github.com/corazawaf/coraza/v3 (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| corazawaf/corazageneric | >=3.0.0 <3.8.1 | 3.8.1 |
| github.com/corazawaf/coraza/v3go | >=3.0.0,<3.8.1 | 3.8.1 |
| github.com/corazawaf/coraza/v3go | >=3.0.0 <3.8.1 | 3.8.1 |
Published upstream
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.