CVE-2021-26690

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
Apache Software FoundationApache HTTP Server2.4.46; 2.4.43; 2.4.41; 2.4.39; 2.4.38; 2.4.37; 2.4.35; 2.4.34; 2.4.33; 2.4.29; 2.4.28; 2.4.27; 2.4.26; 2.4.25; 2.4.23; 2.4.20; 2.4.18; 2.4.17; 2.4.16; 2.4.12

References

Timeline

Published
Jun 10, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-266919.8In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflowCVE-2021-266975.3The lineage endpoint of the deprecated Experimental API was not protected by authentication in Airflow 2.0.0. This allowed unauthenticated uCVE-2021-266986.1OX App Suite before 7.10.3-rev32 and 7.10.4 before 7.10.4-rev18 allows XSS via a code snippet (user-generated content) when a sharing link iCVE-2021-266995.4OX App Suite before 7.10.3-rev4 and 7.10.4 before 7.10.4-rev4 allows SSRF via a shared SVG document that is mishandled by the imageconverterCVE-2021-267007.8Visual Studio Code npm-script Extension Remote Code Execution VulnerabilityCVE-2021-267018.1.NET Core Remote Code Execution VulnerabilityCVE-2021-267026.1EPrints 3.4.2 exposes a reflected XSS opportunity in the dataset parameter to the cgi/dataset_dictionary URI.CVE-2021-267039.8EPrints 3.4.2 allows remote attackers to read arbitrary files and possibly execute commands via crafted JSON/XML input to a cgi/ajax/phrase CVE-2021-267048.8EPrints 3.4.2 allows remote attackers to execute arbitrary commands via crafted input to the verb parameter in a cgi/toolbox/toolbox URI.CVE-2021-267059.1An issue was discovered in SquareBox CatDV Server through 9.2. An attacker can invoke sensitive RMI methods such as getConnections without aCVE-2021-267069.8An issue was discovered in lib_mem.c in Micrium uC/OS uC/LIB 1.38.x and 1.39.00. The following memory allocation functions do not check for CVE-2021-267079.8The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to i
CVE-2021-26690: High severity, CVSS 7.5 | Vulnix