Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-53654Grav: Unauthenticated open redirect via login twofa_cancel _redirect

Medium 5.3

In plain English

A medium-severity open redirect in grav from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.5%top 55.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Grav is a file-based Web platform. Prior to 3.8.5, the Login plugin twofa_cancel task accepts a client-controlled _redirect field without a nonce and allows an unauthenticated request to set an external http, https, or protocol-relative Location target. Controller::execute() applies the field when taskTwofa_cancel() sets no redirect, and Grav::getRedirectResponse() accepts the target through Uri::isExternal(), enabling phishing redirects from a trusted Grav host. This issue is fixed in version 3.8.5.

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	< 3.8.5

Weakness: CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://github.com/getgrav/grav/security/advisories/GHSA-wwcc-xxhc-44j6 x_refsource_CONFIRM
https://github.com/getgrav/grav-plugin-login/commit/1535e51d2a9cbc3f1bb1e262e791c142a06ce959 x_refsource_MISC
https://github.com/getgrav/grav-plugin-login/releases/tag/3.8.5 x_refsource_MISC