Vulnerability · Published Feb 25, 2026 · Assigned by VulnCheck

CVE-2026-25554OpenSIPS 3.1 <= 3.6.4 auth_jwt SQL Injection Enables JWT Authentication Bypass

Medium 6.5

In plain English

A medium-severity SQL injection in OpenSIPS from OpenSIPS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 69.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OpenSIPS versions 3.1 before 3.6.4 containing the auth_jwt module (prior to commit 3822d33) contain a SQL injection vulnerability in the jwt_db_authorize() function in modules/auth_jwt/authorize.c when db_mode is enabled and a SQL database backend is used. The function extracts the tag claim from a JWT without prior signature verification and incorporates the unescaped value directly into a SQL query. An attacker can supply a crafted JWT with a malicious tag claim to manipulate the query result and bypass JWT authentication, allowing impersonation of arbitrary identities.

Affected products (as reported)

Vendor	Product	Versions
OpenSIPS	OpenSIPS	3.1 – before 3.6.4

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

References

https://opensips.org/pub/opensips/3.6.4/ChangeLog release-notes
https://github.com/OpenSIPS/opensips/pull/3807 issue-tracking
https://github.com/OpenSIPS/opensips/commit/3822d33c1c6b25832fdd88da1d23eed74be55b05 patch
https://opensips.org/ product
https://www.vulncheck.com/advisories/opensips-auth-jwt-sql-injection-enables-jwt-authentication-bypass third-party-advisory