VULNERABILITY INTELLIGENCE

CVE-2021-37147

CVSS score7.5 HIGH

EPSS probability2.52%

CISA KEVNot currently listed

Published2021-11-03

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.

Weakness classification

security@apache.org: CWE-20
nvd@nist.gov: CWE-20

Primary references

security@apache.org — Mailing List, Patch, Vendor Advisory
security@apache.org — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory