What’s Vulnerable › Vulnerabilities

CVE-2026-59713: Leantime - OIDC Login CSRF via Unconditional State Verification Stub

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-06 · updated 2026-10-25
• Weakness: CWE-352

Description

Leantime contains an OIDC login CSRF vulnerability in the verifyState() method that unconditionally returns true without validating state parameters. Attackers can craft malicious callback URLs with attacker-controlled authorization codes to perform session fixation, logging victims in as the attacker.

Affected products

• Leantime: through 3.4.4

References

• https://github.com/Leantime/leantime
• https://github.com/Leantime/leantime/commit/9630eb7db682fb1b4e23cdabf3428d03ec6f5094
• https://github.com/Leantime/leantime/issues/3535
• https://www.vulncheck.com/advisories/leantime-oidc-login-csrf-via-unconditional-state-verification-stub

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