VULNERABILITY INTELLIGENCE
CVE-2021-26691
CVSS score9.8 CRITICAL
EPSS probability68.29%
CISA KEVNot currently listed
Published2021-06-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow
Weakness classification
- security@apache.org: CWE-122
- nvd@nist.gov: CWE-787
Primary references
- security@apache.org — Vendor Advisory
- security@apache.org — Mailing List, Third Party Advisory
- security@apache.org
- security@apache.org
- security@apache.org — Mailing List, Release Notes, Vendor Advisory
- security@apache.org — Mailing List, Third Party Advisory
- security@apache.org
- security@apache.org
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory
- security@apache.org — Mailing List, Third Party Advisory
- security@apache.org — Patch, Third Party Advisory