CWE-324: Use of a Key Past its Expiration Date
The product uses a cryptographic key or password past its expiration date, which diminishes its safety significantly by increasing the timing window for cracking attacks against that key.
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Overview
While the expiration of keys does not necessarily ensure that they are compromised, it is a significant concern that keys which remain in use for prolonged periods of time have a decreasing probability of integrity. For this reason, it is important to replace keys within a period of time proportional to their strength.
Real-world CVEs
22 recorded CVEs are caused by CWE-324 (Use of a Key Past its Expiration Date). The highest-severity and most recent are shown first. 4 new CWE-324 CVEs have been recorded so far in 2026 (5 in 2025).
- CVE-2025-2291
PgBouncer default auth_query does not take Postgres password expiry into account
Critical · CVSS 9.8 · EPSS 27th2025-04-16 - CVE-2024-36031
keys: Fix overwrite of key expiration on instantiation
Critical · CVSS 9.8 · EPSS 52th2024-05-30 - CVE-2026-39923
Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset