CVE-2021-26691

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CVSS 3.1

9.8 critical

EPSS

68%p99

Published

Jun 10, 2021 (Jun 10, 2021)

Modified

Jun 17, 2026

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

Vendors: apache debian fedoraproject oracle netapp
Products: http server, debian linux, fedora, enterprise manager ops center, instantis enterprisetrack, secure backup, zfs storage appliance kit, cloud backup
Weakness: CWE-122, CWE-787
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (68.3%)

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