CVE-2025-53537
published 2025-07-23CVE-2025-53537: LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak…
PriorityP338high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.42%
33.6th percentile
LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libhtp | < libhtp 1:0.5.51-1 (forky) | libhtp 1:0.5.51-1 (forky) |
| oisf | libhtp | < 0.5.51 | 0.5.51 |
| oisf | libhtp | >= 0 < 1:0.5.50-1+deb13u1 | 1:0.5.50-1+deb13u1 |
| oisf | libhtp | >= 0 < 1:0.5.51-1 | 1:0.5.51-1 |
| oisf | libhtp | >= 0 < 0.5.15-1ubuntu0.1~esm1 | 0.5.15-1ubuntu0.1~esm1 |
| oisf | libhtp | >= 0 < 1:0.5.26-1ubuntu0.1~esm1 | 1:0.5.26-1ubuntu0.1~esm1 |
| oisf | libhtp | >= 0 < 1:0.5.32-1ubuntu0.1~esm1 | 1:0.5.32-1ubuntu0.1~esm1 |
| oisf | libhtp | >= 0 < 1:0.5.39-1ubuntu0.1~esm1 | 1:0.5.39-1ubuntu0.1~esm1 |
| oisf | libhtp | >= 0 < 1:0.5.46-1ubuntu2+esm1 | 1:0.5.46-1ubuntu2+esm1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5LOW
vendor_ubuntu7.5HIGH
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OSV
libhtp vulnerabilities
osv·2025-10-09·CVSS 7.5
CVE-2024-23837 [HIGH] libhtp vulnerabilities
libhtp vulnerabilities
It was discovered that LibHTP did not correctly handle certain HTTP
headers. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)
It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)
It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2024-45797)
It was discovered that LibHTP did not correctly handle certain memory
opera
OSV
CVE-2025-53537: LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces
osv·2025-07-23·CVSS 7.5
CVE-2025-53537 [HIGH] CVE-2025-53537: LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces
LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.
Ubuntu
LibHTP vulnerabilities
vendor_ubuntu·2025-10-09·CVSS 7.5
CVE-2025-53537 [HIGH] LibHTP vulnerabilities
Title: LibHTP vulnerabilities
Summary: Several security issues were fixed in LibHTP.
It was discovered that LibHTP did not correctly handle certain HTTP
headers. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)
It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)
It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2024-45797)
It was disco
Debian
CVE-2025-53537: libhtp - LibHTP is a security-aware parser for the HTTP protocol and its related bits and...
vendor_debian·2025·CVSS 7.5
CVE-2025-53537 [HIGH] CVE-2025-53537: libhtp - LibHTP is a security-aware parser for the HTTP protocol and its related bits and...
LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 1:0.5.51-1)
sid: resolved (fixed in 1:0.5.51-1)
trixie: resolved (fixed in 1:0.5.50-1+deb13u1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-07-23
Published