7.5

CVE-2024-42516: apache software foundation apache http server Improper Input Validation

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2024-42516UBUNTU-CVE-2024-42516DEBIAN-CVE-2024-42516
Published 10-07-2025Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2024-42516 is a high (CVSS 7.5) Improper Input Validation vulnerability in apache software foundation apache http server. EPSS estimates a 0.82% chance of exploitation in the next 30 days, higher than 56.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.82%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 20 · Related 10
DLA-4270-1MGASA-2025-0301OPENSUSE-SU-2025:15360-1RHSA-2026:34109RHSA-2026:41906RHSA-2026:42828

Timeline

  1. 10-07-2025
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response. This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue. Users are recommended to upgrade to version 2.4.64, which fixes this issue.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.82%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.08 pp

From 0.74% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.82%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • apache2< 2.4.64-r0
Apache1 product
Apache software foundation1 product
Debian1 product
  • apache2< 2.4.65-1~deb12u1 | < 2.4.64-1
Ubuntu1 product
  • apache2< 2.4.7-1ubuntu4.22+esm12 | < 2.4.18-2ubuntu3.17+esm16 | < 2.4.29-1ubuntu4.27+esm6 | < 2.4.41-4ubuntu3.23+esm2 | < 2.4.52-1ubuntu4.15 | < 2.4.58-1ubuntu8.7 | < 2.4.64-1ubuntu2

5 vendors · 5 products

References

13 links
Show all 13 references