CVE-2026-38447 Details
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.
A vulnerability exists in osTicket version 1.18.3 related to the generation of API keys. The keys are created using a predictable method that involves MD5 hashing, which is a broken cryptographic algorithm. This process incorporates the current timestamp, client IP address, and a random value, but the randomness is insufficient. As a result, an attacker could estimate when a key was generated and brute-force the key within a reasonable timeframe. The vulnerability allows for the recovery or forgery of API keys, which could then be used to access ticket data, create tickets as other users, and trigger certain automated processes, leading to unauthorized information access, privilege escalation, and some impact on system availability.
Users can upgrade to osTicket version 1.18.4, which addresses this vulnerability by changing the API key generation method to use a cryptographically secure random number generator (CSPRNG) and removing the reliance on predictable inputs like the timestamp and IP address.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 3, 2026CISA-ADP
Assessed Aug 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fr3akhacks/cve-disclosures/blob/master/osTicket/CVE-2026-38447.md | [email protected] | AdvisoryTechnical Description |
| https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.api.php#L149 | [email protected] | Source CodeVendor |
| https://github.com/osTicket/osTicket/blob/v1.18.3/include/class.misc.php | [email protected] | Source CodeVendor |
| https://github.com/osTicket/osTicket/commit/feccb6a3a90863fd31215ee738b39762177e658c | [email protected] | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-331 | Insufficient Entropy | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| osTicket | <= 1.18.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 3, 2026 | CVE Modified | CISA-ADP |
| Aug 3, 2026 | New CVE Received | [email protected] |