CVE catalog
CVE-2026-54428
Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.87% · Oct 25, 2026
Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder 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 oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | httpcomponents-core | sid | 4.4.16-1 | vulnerable |
| Debian | httpcomponents-core | forky | 4.4.16-1 | vulnerable |
| Debian | httpcomponents-core | trixie | 4.4.16-1 | vulnerable |
| Debian | httpcomponents-core | bookworm | 4.4.16-1 | not affected |
| Debian | httpcomponents-core5 | sid | 5.4.4-1 | fixed |
| Debian | httpcomponents-core5 | forky | 5.4.4-1 | fixed |
| Debian | httpcomponents-core5 | trixie | 5.2.2-1 | vulnerable |
| Debian | httpcomponents-core5 | bookworm | 5.2.1-1 | vulnerable |
| Cpe | httpcomponents-core | Not reported | Not reported | vulnerable |
| Cpe | httpcomponents-core5 | Not reported | Not reported | vulnerable |
| Cpe | httpcomponents_core | Not reported | Not reported | unknown |
| Maven | org.apache.httpcomponents.core5:httpcore5-h2 | Not reported | 5.5-beta2 | fixed |
| Cpe | httpcomponents_core | Not reported | Not reported | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | httpcomponents-core | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-core | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-core | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-core | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Debian | httpcomponents-core5 | source | sid | 5.4.3-1 | not yet assigned | Not reported | [1141387] |
| Debian | httpcomponents-core5 | source | forky | 5.4.3-1 | not yet assigned | Not reported | [1141387] |
| Debian | httpcomponents-core5 | source | trixie | (unfixed) | not yet assigned | Not reported | [1141387] |
| Debian | httpcomponents-core5 | source | bookworm | (unfixed) | not yet assigned | Not reported | [1141387] |
| Maven | org.apache.httpcomponents.core5:httpcore5-h2 | maven | Not reported | 5.5-beta2 | Not reported | GHSA-V3JC-474W-2WM6 | Not reported |
Notes
[trixie] httpcomponents-core: Minor issue [trixie] httpcomponents-core5: Minor issue [bookworm] httpcomponents-core5: Minor issue; HTTP/2 HPACK decoder present in 5.x, unlike 4.x
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libhttpcore5-java]Affected
Source package: [httpcomponents-core5]
Details (2)
5.2.1-1· all · bookwormAffected
nvd · httpcomponents-core5 · debian · bookworm; nvd · httpcomponents-core5 · debian · 12
5.2.1-1· all · bookwormAffected
nvd · httpcomponents-core5 · debian · bookworm; nvd · httpcomponents-core5 · debian · 12
- [libhttpcore-java]Not affected
Source package: [httpcomponents-core]
Details (2)
4.4.16-1· all · bookwormNot affected
nvd · httpcomponents-core · debian · bookworm
4.4.16-1· all · bookwormNot affected
nvd · httpcomponents-core · debian · bookworm
[Debian 13 (Trixie)]
- [libhttpcore5-java]Affected
Source package: [httpcomponents-core5]
Details (2)
5.2.2-1· all · trixieAffected
nvd · httpcomponents-core5 · debian · 13
5.2.2-1· all · trixieAffected
nvd · httpcomponents-core5 · debian · 13
- [libhttpcore-java]Affected
Source package: [httpcomponents-core]
Details (2)
4.4.16-1· all · trixieAffected
nvd · httpcomponents-core · debian · 13
4.4.16-1· all · trixieAffected
nvd · httpcomponents-core · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/07/01/3]
- [https://github.com/advisories/GHSA-v3jc-474w-2wm6]
- [https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54428]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54428]
- [https://security-tracker.debian.org/tracker/CVE-2026-54428]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54428.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2172.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]