CVE catalog
CVE-2026-64607
HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value
- 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
- 0.46% · Oct 25, 2026
HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model. This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.
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 | commons-httpclient | sid | 3.1-16 | unknown |
| Debian | commons-httpclient | forky | 3.1-16 | unknown |
| Debian | commons-httpclient | trixie | 3.1-16 | unknown |
| Debian | commons-httpclient | bookworm | 3.1-16 | unknown |
| Debian | httpcomponents-client | sid | 4.5.14-1 | unknown |
| Debian | httpcomponents-client | forky | 4.5.14-1 | unknown |
| Debian | httpcomponents-client | trixie | 4.5.14-1 | unknown |
| Debian | httpcomponents-client | bookworm | 4.5.14-1 | unknown |
| Maven | org.apache.httpcomponents.client5:httpclient5 | Not reported | 5.6.3 | fixed |
| Opensuse | httpcomponents-client | leap 16.0 | 4.5.14-160000.4.1 | fixed |
| Suse | httpcomponents-client | linux enterprise module for development tools 15 sp7 | 4.5.14-150200.3.12.1 | fixed |
| Opensuse | httpcomponents-client | tumbleweed | 4.5.14-2.1 | fixed |
| Cpe | httpclient | Not reported | 5.6.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | commons-httpclient | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | commons-httpclient | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | commons-httpclient | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | commons-httpclient | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-client | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-client | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-client | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | httpcomponents-client | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Maven | org.apache.httpcomponents.client5:httpclient5 | maven | Not reported | 5.6.3 | Not reported | GHSA-HJCP-JMPX-G3QM | Not reported |
| Opensuse | httpcomponents-client | rpm | leap 16.0 | 4.5.14-160000.4.1 | Not reported | OPENSUSE-SU-2026:21894-1 | Not reported |
| Suse | httpcomponents-client | rpm | linux enterprise module for development tools 15 sp7 | 4.5.14-150200.3.12.1 | Not reported | SUSE-SU-2026:4028-1 | Not reported |
| Opensuse | httpcomponents-client | rpm | tumbleweed | 4.5.14-2.1 | Not reported | OPENSUSE-SU-2026:11647-1 | Not reported |
| Cpe | httpclient | cpe | Not reported | 5.6.3 | Not reported | NVD-CVE-2026-64607 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libcommons-httpclient-java]Affected
Source package: [commons-httpclient]
Details (2)
3.1-16· all · bookwormAffected
nvd · commons-httpclient · debian · bookworm; nvd · commons-httpclient · debian · 12
3.1-16· all · bookwormAffected
nvd · commons-httpclient · debian · bookworm; nvd · commons-httpclient · debian · 12
- [libcommons-httpclient-java-doc]Affected
Source package: [commons-httpclient]
Details (2)
3.1-16· all · bookwormAffected
nvd · commons-httpclient · debian · bookworm; nvd · commons-httpclient · debian · 12
3.1-16· all · bookwormAffected
nvd · commons-httpclient · debian · bookworm; nvd · commons-httpclient · debian · 12
- [libhttpclient-java]Affected
Source package: [httpcomponents-client]
Details (2)
4.5.14-1· all · bookwormAffected
nvd · httpcomponents-client · debian · bookworm; nvd · httpcomponents-client · debian · 12
4.5.14-1· all · bookwormAffected
nvd · httpcomponents-client · debian · bookworm; nvd · httpcomponents-client · debian · 12
- [libhttpmime-java]Affected
Source package: [httpcomponents-client]
Details (2)
4.5.14-1· all · bookwormAffected
nvd · httpcomponents-client · debian · bookworm; nvd · httpcomponents-client · debian · 12
4.5.14-1· all · bookwormAffected
nvd · httpcomponents-client · debian · bookworm; nvd · httpcomponents-client · debian · 12
[Debian 13 (Trixie)]
- [libcommons-httpclient-java]Affected
Source package: [commons-httpclient]
Details (2)
3.1-16· all · trixieAffected
nvd · commons-httpclient · debian · 13
3.1-16· all · trixieAffected
nvd · commons-httpclient · debian · 13
- [libcommons-httpclient-java-doc]Affected
Source package: [commons-httpclient]
Details (2)
3.1-16· all · trixieAffected
nvd · commons-httpclient · debian · 13
3.1-16· all · trixieAffected
nvd · commons-httpclient · debian · 13
- [libhttpclient-java]Affected
Source package: [httpcomponents-client]
Details (2)
4.5.14-1· all · trixieAffected
nvd · httpcomponents-client · debian · 13
4.5.14-1· all · trixieAffected
nvd · httpcomponents-client · debian · 13
- [libhttpmime-java]Affected
Source package: [httpcomponents-client]
Details (2)
4.5.14-1· all · trixieAffected
nvd · httpcomponents-client · debian · 13
4.5.14-1· all · trixieAffected
nvd · httpcomponents-client · debian · 13
[openSUSE Tumbleweed]
- [httpcomponents-client-cache]Unknown
Source package: [httpcomponents-client]
Details (1)
4.5.14-2.1· noarch · tumbleweedUnknown · Fixed:
4.5.14-2.1Version impact unknown
nvd · httpcomponents-client · opensuse · tumbleweed
- [httpcomponents-client-javadoc]Unknown
Source package: [httpcomponents-client]
Details (1)
4.5.14-2.1· noarch · tumbleweedUnknown · Fixed:
4.5.14-2.1Version impact unknown
nvd · httpcomponents-client · opensuse · tumbleweed
- [httpcomponents-client]Fixed
Source package: [httpcomponents-client]
Details (1)
4.5.14-2.1· noarch · tumbleweedFixed · Fixed:
4.5.14-2.1nvd · httpcomponents-client · opensuse · tumbleweed
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/08/13/5]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11647-1.json]
- [https://github.com/advisories/GHSA-hjcp-jmpx-g3qm]
- [https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-64607]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-64607]
- [https://osv.dev/vulnerability/SUSE-SU-2026:4028-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11647-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21894-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-64607]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64607.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3379.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] · [SUSE security advisories and VEX]