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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OISF | libhtp | = 0.5.46 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | libhtp | 1:0.5.47-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | libhtp | 1:0.5.46-1ubuntu2+esm1 | USN-7814-1 |
| Ubuntu Pro 22.04 LTS | libhtp | 1:0.5.39-1ubuntu0.1~esm1 | USN-7814-1 |
| Ubuntu Pro 20.04 LTS | libhtp | 1:0.5.32-1ubuntu0.1~esm1 | USN-7814-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | libhtp | 1:0.5.26-1ubuntu0.1~esm1 | USN-7814-1 |
| Ubuntu Pro 16.04 LTS | libhtp | 0.5.15-1ubuntu0.1~esm1 | USN-7814-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libhtp | 0.5.48-2.1 | openSUSE-SU-2024:14016-1 |
Advisories 2
- USN-7814-1 libhtp vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2024:14016-1 libhtp-devel-0.5.48-2.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025