CVE-2026-39322

critical · 9.2

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.

9.2

CVSS

0.2%

EPSS (exploit prob.)

15th

EPSS percentile

2026-04-07

Published

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-287

Affected products

Vendor	Product	Affected versions
polarlearn	polarlearn	all versions

Check a specific version with /api/v1/cve/match.

References

https://github.com/polarnl/PolarLearn/security/advisories/GHSA-9vx4-7ww7-4cf5

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-39322