LibHTP unbounded folded header handling leads to denial service
Priority MEDIUM 41CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
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 it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01193 68th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed libhtp (OISF): 0.5.46
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OISF | libhtp | before 0.5.46 | 0.5.46 | Patch available | CNA |
- libhtp VendorOISF Affected before 0.5.46 Fixed in 0.5.46 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oisf:libhtp:*:*:*:*:*:*:*:* | before 0.5.46 | Vulnerable | OISF |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* | 39 | Vulnerable | Fedoraproject |
- cpe:2.3:a:oisf:libhtp:*:*:*:*:*:*:*:* Versions before 0.5.46 Vulnerable ·OISF
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* Versions 39 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA libhtp (OISF) Fixed in 0.5.46
Timeline
- 2026-10-02 Threatist record created from CVE-2024-23837
References
More OISF Libhtp vulnerabilities
- TI-2018-07267 htp_parse_authorization_digest in htp_parsers.c in LibHTP 0.5.26 allows remote attackers… CVSS 3.0CRITICAL 9.8
- TI-2024-30764 LibHTP's unbounded header handling leads to denial service CVSS 3.1HIGH 7.5
- TI-2024-19070 Excessive CPU used on malformed traffic CVSS 3.1HIGH 7.5
- TI-2025-33481 LibHTP's memory leak with lzma can lead to resource starvation CVSS 3.1HIGH 7.5
- TI-2015-00864 libhtp 0.5.15 allows remote attackers to cause a denial of service (NULL pointer dereference). CVSS 3.1HIGH 7.5
- TI-2019-13009 In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP… CVSS 3.1MEDIUM 5.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences