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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-72701

Grav CMS before 2.0.16 Timing Attack via verifyNonce

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

Grav CMS before 2.0.16 contains a timing vulnerability in Utils::verifyNonce() that uses non-constant-time string comparison with the === operator instead of hash_equals() for CSRF nonce validation. Attackers can measure response timing differences to recover valid nonce values byte-by-byte through multiple requests, weakening CSRF protection below its intended security margin.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

getgrav grav

Default version status: unaffected

  • 0 to < 2.0.16affected
  • 2.0.16unaffected
pkg:composer/getgrav/grav

References