What is CVE-2026-93868?

CVE-2026-93868 is a high-severity vulnerability in Cotonti, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.1/10. Published 2026-09-18.

How severe is CVE-2026-93868?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Cotonti

CVE-2026-93868

Cotonti through 1.0.0 derives password recovery validation tokens from md5(microtime()) in users.passrecover.php, creating a predictable token space of approximately one million values per second. Unauthenticated attackers can read the server Date header, precompute candidate tokens within a narrow time window, and probe them against the passrecover authentication endpoint to reset any account password including administrators.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cotonti

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (issue-tracking, patch)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-93868?: CVE-2026-93868 is a high-severity vulnerability in Cotonti, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.1/10. Published 2026-09-18.
How severe is CVE-2026-93868?: High severity. CVSS v3 base score is 8.1 out of 10.