Vulnerability · Published Oct 12, 2026 · Assigned by GitHub_M

CVE-2026-41510OWASP Coraza WAF: Silent argument drop at ArgumentLimit allows bypass of ARGS-targeted rules via parameter flooding

High 7.2

In plain English

A high-severity resource allocation without limits in coraza from corazawaf. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.4%top 68.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.1, Coraza silently drops arguments after SecArgumentsLimit in internal/corazawaf/transaction.go, while internal/bodyprocessors/urlencoded.go writes ARGS_POST without enforcing the cap. The flaw is triggered when an unauthenticated attacker sends more arguments than SecArgumentsLimit or supplies bodies that expand beyond the configured argument and flattening budgets. An unauthenticated attacker can flood requests with arguments so excess values are silently omitted from ARGS, ARGS_GET, ARGS_NAMES, ARGS_GET_NAMES, ARGS_POST, or ARGS_PATH before security rules inspect them; affected urlencoded and JSON processing can also consume excessive memory. The omission can bypass WAF rules protecting the downstream application, and unbounded or amplified argument processing can cause memory consumption and service degradation. This issue is fixed in version 3.8.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/corazawaf/coraza	no fix listed	GO-2026-6668
Go	github.com/corazawaf/coraza/v2	no fix listed	GO-2026-6668
Go	github.com/corazawaf/coraza/v3	3.8.1	GHSA-6r3q-mjv7-xr8m
Go	github.com/corazawaf/coraza/v3	3.8.1	GO-2026-6668

Affected products (as reported)

Vendor	Product	Versions
corazawaf	coraza	>= 3.0.0, < 3.8.1

Weakness: CWE-693, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

References

https://github.com/corazawaf/coraza/security/advisories/GHSA-6r3q-mjv7-xr8m x_refsource_CONFIRM
https://github.com/corazawaf/coraza/commit/146c2f79f39ad16f13787e7d67ad400f8d8cb9a3 x_refsource_MISC
https://github.com/corazawaf/coraza/commit/b98359bb7e7606c95100dcc7ad490d2d624e6dea x_refsource_MISC
https://github.com/corazawaf/coraza/releases/tag/v3.8.1 x_refsource_MISC