PUBLISHED
2026-08-19 08:17
MODIFIED
2026-08-19 08:17
EPSS (Prob. Exploit)
0.51%
Top 57.4%
> DESCRIPTION
Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify.
Each of the three compares the signature carried in the message against the locally computed one with the eq operator, which returns as soon as the two strings differ. The time taken to reject a signature varies with the length of the matching prefix. RSA-SHA1 is not affected, as it verifies through the RSA key object rather than by comparing strings.
A client that can submit messages and time the replies may recover a valid signature one byte at a time rather than searching the whole signature space. Under PLAINTEXT the value compared against is the signature key itself, so the search recovers consumer_secret and token_secret.
> AFFECTED_PRODUCTS
ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.
> CWE DETAILED DESCRIPTIONS
CWE-208: Observable Timing Discrepancy - Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)
Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify
AFFECTED PACKAGES:
Unknown / Unknown
4 versions affected
ALIASES:
GHSA-g8xr-69p3-gw56
> HISTORIQUE DES MODIFICATIONS
Première apparition
19/08/2026 08:17
Source: NVD
📊
ENRICHISSEMENT
01/09/2026 06:02
CWE
Champ modifié: Description CWE
Nouvelle valeur:
CWE-208: Observable Timing Discrepancy - Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant infor...
Total des modifications: 1
Dernière mise à jour: 1 month ago