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CVE

CVE-2026-39923

Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset
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CVE

CVE-2026-39923

Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset

Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39923.json, https://github.com/flarum/framework/releases/tag/v1.8.16, https://nvd.nist.gov/vuln/detail/CVE-2026-39923, https://www.vulncheck.com/advisories/flarum-password-reset-token-expiry-bypass-via-post-reset, https://github.com/flarum/framework/pull/4545, https://github.com/flarum/framework/commit/2803058d0f9dc38252326070b46d4484fe5a857d, https://github.com/flarum/framework

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.0026%
EPSS Percentile
0.17461%
Introduced Version
0
Fix Available
2803058d0f9dc38252326070b46d4484fe5a857d

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