What is CVE-2026-42528?
A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes. Users are recommended to upgrade to version 2.4.69, which fixes this issue
The record classifies CVE-2026-42528 under weakness class CWE-789. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 22 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 4.3 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - EPSS (FIRST)
- 0.4% probability of exploitation in the next 30 days, higher than 33.9% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-10-01
Is CVE-2026-42528 being exploited?
It currently carries a trending score of 41 in the Threadlinqs vulnerability feed.
Affected products and versions
- Apache Software Foundation: Apache HTTP Server
How to fix CVE-2026-42528
No vendor patch reference has been recorded for CVE-2026-42528 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-42528
1 tracked threat in the Threadlinqs corpus references CVE-2026-42528, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .