What is CVE-2026-58187?

CVE-2026-58187 is a low-severity vulnerability in Apache Software Foundation Traffic Server, classified under Out-of-bounds Write. CVSS score: 3.7/10. Published 2026-07-29.

How severe is CVE-2026-58187?

Low severity. CVSS v3 base score is 3.7 out of 10.

Buffer overflow in Apache Software Foundation Traffic Server

CVE-2026-58187

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 throug…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Apache Software Foundation Traffic Server — versions 8.0.0, 9.0.0, 10.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security@apache.org (vendor-advisory)

Frequently asked questions

What is CVE-2026-58187?: CVE-2026-58187 is a low-severity vulnerability in Apache Software Foundation Traffic Server, classified under Out-of-bounds Write. CVSS score: 3.7/10. Published 2026-07-29.
How severe is CVE-2026-58187?: Low severity. CVSS v3 base score is 3.7 out of 10.