How severe is CVE-2024-28871?

CVE-2024-28871 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-28871 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-28871?

CVE-2024-28871 affects Oisf Libhtp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-28871?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-28871 have an EU (EUVD) identifier?

Yes. CVE-2024-28871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25941.

When was CVE-2024-28871 published?

CVE-2024-28871 was published on 2024-04-04 and last updated on 2026-06-17.

CVE-2024-28871

CVE-2024-28871 is a high-severity vulnerability in Oisf Libhtp with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-25941
Weakness: CWE-770
Affected product: Oisf Libhtp
Published: 2024-04-04
Last modified: 2026-06-17

Description

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Version 0.5.46 may parse malformed request traffic, leading to excessive CPU usage. Version 0.5.47 contains a patch for the issue. No known workarounds are available.

Frequently asked questions

What is CVE-2024-28871?: LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Version 0.5.46 may parse malformed request traffic, leading to excessive CPU usage. Version 0.5.47 contains a patch for the issue. No known workarounds are available.
How severe is CVE-2024-28871?: CVE-2024-28871 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-28871 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-28871?: CVE-2024-28871 affects Oisf Libhtp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-28871?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-28871 have an EU (EUVD) identifier?: Yes. CVE-2024-28871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25941.
When was CVE-2024-28871 published?: CVE-2024-28871 was published on 2024-04-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oisf:libhtp:0.5.46:*:*:*:*:*:*:*

More vulnerabilities in Oisf Libhtp

CVE-2018-10243 — Critical (CVSS 9.8): htp_parse_authorization_digest in htp_parsers.c in LibHTP 0.5.26 allows remote attackers to cause a heap-based buffer…
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CVE-2024-45797 — High (CVSS 7.5): LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49,…
CVE-2024-23837 — High (CVSS 7.5): LibHTP is a security-aware parser for the HTTP protocol. Crafted traffic can cause excessive processing time of HTTP…
CVE-2015-0928 — High (CVSS 7.5): libhtp 0.5.15 allows remote attackers to cause a denial of service (NULL pointer dereference).
CVE-2019-17420 — Medium (CVSS 5.3): In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error causes the…

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