How severe is CVE-2026-39322?

CVE-2026-39322 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-39322 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39322?

CVE-2026-39322 affects Polarlearn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39322?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39322 have an EU (EUVD) identifier?

Yes. CVE-2026-39322 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19853.

When was CVE-2026-39322 published?

CVE-2026-39322 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-39322

CVE-2026-39322 is a high-severity vulnerability in Polarlearn with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 9.2
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19853
Weakness: CWE-287
Affected product: Polarlearn
Published: 2026-04-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-39322?: 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.
How severe is CVE-2026-39322?: CVE-2026-39322 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-39322 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39322?: CVE-2026-39322 affects Polarlearn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39322?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39322 have an EU (EUVD) identifier?: Yes. CVE-2026-39322 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19853.
When was CVE-2026-39322 published?: CVE-2026-39322 was published on 2026-04-07 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:polarlearn:polarlearn:-:*:*:*:*:*:*:*

More vulnerabilities in Polarlearn

CVE-2026-35610 — High (CVSS 8.8): PolarLearn is a free and open-source learning program. In 0-PRERELEASE-14 and earlier, setCustomPassword(userId,…
CVE-2026-25221 — High (CVSS 8.1): PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, the OAuth 2.0 implementation for…
CVE-2026-25885 — High (CVSS 7.5): PolarLearn is a free and open-source learning program. In 0-PRERELEASE-16 and earlier, the group chat WebSocket at…
CVE-2026-25222 — High (CVSS 7.5): PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, a timing attack vulnerability in…
CVE-2026-25126 — High (CVSS 7.1): PolarLearn is a free and open-source learning program. Prior to version 0-PRERELEASE-15, the vote API route (`POST…

All CVEs affecting Polarlearn →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →