CVE-2026-43951: apache software foundation apache http server Out-of-bounds Read
CVSS: 6.5v3.1MediumAnalyzed
AliasesALPINE-CVE-2026-43951UBUNTU-CVE-2026-43951DEBIAN-CVE-2026-43951
Published 08-06-2026Last modified 08-06-2026
Vulnerability summary
CVE-2026-43951 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in apache software foundation apache http server. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.4% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
1.04%
0%100%
Low · +0.50 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 23 · Related 8MGASA-2026-0289OPENSUSE-SU-2026:21235-1RHSA-2026:25042RHSA-2026:34109RHSA-2026:34355RHSA-2026:41906RHSA-2026:42828RHSA-2026:50538RHSA-2026:50572RHSA-2026:55930RHSA-2026:55992RHSA-2026:56868RHSA-2026:59387RHSA-2026:62165RHSA-2026:66323RHSA-2026:67152SUSE-SU-2026:22564-1SUSE-SU-2026:2686-1SUSE-SU-2026:2717-1SUSE-SU-2026:2735-1SUSE-SU-2026:2759-1USN-8516-1USN-8571-1
Timeline
- 08-06-2026PublishedVulnerability first disclosed.
- 08-06-2026Last modifiedVulnerability information updated.
Description
Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
1.04%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
+0.50 pp
From 0.55% on 18-09-2026
18-09-202618-10-2026
EPSS score1.04%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- apache2< 2.4.68-r0
Apache1 product
- http_server≥ 2.4.0, ≤ 2.4.67
Apache software foundation1 product
- apache http server≥ 2.4.0, ≤ 2.4.67
Debian1 product
- apache2< 2.4.68-1~deb12u1 | < 2.4.68-1~deb13u1 | < 2.4.68-1
Ubuntu1 product
- apache2< 2.4.7-1ubuntu4.22+esm14 | < 2.4.18-2ubuntu3.17+esm19 | < 2.4.29-1ubuntu4.27+esm10 | < 2.4.41-4ubuntu3.23+esm5 | < 2.4.52-1ubuntu4.23 | < 2.4.58-1ubuntu8.15 | All versions (No fix recorded) | < 2.4.66-2ubuntu2.4
5 vendors · 5 products
