CVE-2026-38447
Medium
Elevated severity or exploit probability.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.7%
49.9th percentile
CISA KEV
Not listed
Weakness / dates
CWE-331
Published 2026-08-03 · modified 2026-08-31
Description
osTicket 1.18.3 generates API keys using a predictable construction based on MD5 hashing. The use of MD5, combined with predictable inputs such as the current timestamp and client IP address, significantly reduces entropy. An attacker can approximate the key generation time and brute-force the key space within a feasible time window.
References
- https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-38447.md
- https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.api.php#L149
- https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.misc.php
- https://github.com/osTicket/osTicket/commit/feccb6a3a90863fd31215ee738b39762177e658c