CVE-2026-39322
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductPolarlearn
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-287Improper authentication
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| polarlearn polarlearn | No range specified | — |
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