CVE-2024-23837: LibHTP is a security-aware parser for the HTTP protocol

Q: How do I fix CVE-2024-23837?

libhtp: upgrade to 0.5.46; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-23837 being exploited?

CVE-2024-23837 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-23837 affect?

CVE-2024-23837 affects libhtp, fedora. Severity is high (CVSS 7.5). LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time of HTTP headers, leading to denial of service. This issue is addressed in 0.5.46.

Q: How urgent is CVE-2024-23837?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADEMITIGATE

CVE-2024-23837 is a high-severity flaw (CVSS 7.5) affecting libhtp, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time of HTTP headers, leading to denial of service. This issue is addressed in 0.5.46.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-770
Published	2024-02-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fedoraproject · oisf

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-26 16:27 UTCPublished CVE record published
2026-06-17 07:13 UTCUpdated Record last modified

oisf libhtp UPGRADE

Affected: < 0.5.46

Fixed in: 0.5.46

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libhtp || rpm -q libhtp || libhtp --version

2. UPGRADE to 0.5.46 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libhtp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libhtp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 38 · 39

Fixed in: no fixed release known

Safe to downgrade to: a release before 38

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-23837?

libhtp: upgrade to 0.5.46; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-23837 being exploited?

CVE-2024-23837 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-23837 affect?

CVE-2024-23837 affects libhtp, fedora. Severity is high (CVSS 7.5). LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time of HTTP headers, leading to denial of service. This issue is addressed in 0.5.46.

How urgent is CVE-2024-23837?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-53537 HIGH 7.5 UPGRADE LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces
CVE-2024-45797 HIGH 7.5 UPGRADE LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces
CVE-2024-28871 HIGH 7.5 DOWNGRADE LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces
CVE-2019-17420 MEDIUM 5.3 UPGRADE DOWNGRADE In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error cau
CVE-2018-10243 CRITICAL 9.8 DOWNGRADE htp_parse_authorization_digest in htp_parsers.c in LibHTP 0.5.26 allows remote attackers to cause a heap-based

References

← Back to latest CVEs