| Name | CVE-2026-54399 |
| Description | Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1141387 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| httpcomponents-core (PTS) | bullseye | 4.4.14-1 | vulnerable |
| forky, sid, bookworm, trixie | 4.4.16-1 | vulnerable |
| httpcomponents-core5 (PTS) | bookworm | 5.2.1-1 | vulnerable |
| trixie | 5.2.2-1 | vulnerable |
| forky, sid | 5.4.2-1.1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[trixie] - httpcomponents-core5 <no-dsa> (Minor issue)
[bookworm] - httpcomponents-core5 <postponed> (Minor issue)
[trixie] - httpcomponents-core <no-dsa> (Minor issue)
[bookworm] - httpcomponents-core <postponed> (Minor issue)
[bullseye] - httpcomponents-core <postponed> (Minor issue)
https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy
v4 possibly not affected, needs further validation once fix is identified