CVE-2026-57941
Received Received - Intake

Use After Free in Apache HTTP Server mod_http2

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: Apache Software Foundation

Description
Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

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Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-57941
EUVD
EUVD-2026-90896

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache http_server From 2.4.0 (inc) to 2.4.68 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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Executive Summary

This is a Use After Free vulnerability in Apache HTTP Server's mod_http2 module. It occurs due to shared session->bbtmp re-entrancy, where memory is freed but later accessed again, potentially leading to crashes or arbitrary code execution.

Impact Analysis

This vulnerability could cause Apache HTTP Server to crash or allow attackers to execute arbitrary code on affected systems. It may lead to denial of service or unauthorized access if exploited.

Mitigation Strategies

Upgrade Apache HTTP Server to a version beyond 2.4.68 to address the Use After Free vulnerability in mod_http2.

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