CVE-2026-58187

MEDIUM CVSS 4.0: 6.3 EPSS 0.29%
Updated Jul 29, 2026
Apache
Parameter Value
CVSS 6.3 (MEDIUM)
Affected Versions 8.0.0 — 8.1.9
Fixed In 9.2.15
Type CWE-787 (Out-of-bounds Write)
Vendor Apache
Public PoC No

The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption

CVSS Vector v4.0

Weakness Type (CWE)