Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M
CVE-2026-39322PolarLearn: Any password authenticates banned accounts and grants API access
High 8.8
In plain English
A high-severity improper authentication in PolarLearn from polarnl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.2%top 84.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, POST /api/v1/auth/sign-in creates a valid session for banned accounts before verifying the supplied password. That session is then accepted across authenticated /api routes, enabling account data access and authenticated actions as the banned user.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| polarnl | PolarLearn | <= v0-PRERELEASE-15 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/polarnl/PolarLearn/security/advisories/GHSA-9vx4-7ww7-4cf5 x_refsource_CONFIRM