[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.apache.httpcomponents.client5:httpclient5 (source)	5.5.2 → 5.6.3

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Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS

CVE-2026-64607 / GHSA-hjcp-jmpx-g3qm

More information

Details

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.

Severity

• CVSS Score: 5.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-64607
• https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q
• https://github.com/apache/httpcomponents-client/commit/55733f4121f7ba26ddf04fe12739d9c15962cb94
• https://github.com/apache/httpcomponents-client/commit/ebac9512f555c4a355cad3f59ef2db69b597cc97
• https://github.com/apache/httpcomponents-client/releases/tag/rel/v5.6.3
• https://github.com/apache/httpcomponents-client/releases/tag/rel/v5.7-alpha1
• http://www.openwall.com/lists/oss-security/2026/08/13/5
• https://github.com/advisories/GHSA-hjcp-jmpx-g3qm

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

apache/httpcomponents-client (org.apache.httpcomponents.client5:httpclient5)

v5.6

This is the first ALPHA release in the 5.6 release series. It adds several features
such as transport content decompression and content compression for the async transport,
support for Unix sockets, experimental support for SCRAM-SHA-256 authentication scheme,
and Micrometer/OTel observations & metrics.

Commons Compress, Brotli codec, and ZStd codec are optional dependencies and get
wired into the execution pipeline only if present on the classpath.

Notable changes and features included in the 5.6 series:

• Unix domain socket support.

• Support for pluggable content codecs via Commons-Compress in the classic transport.
  (optional).

• Support for transparent content decompression and content compression with deflate,
  gzip, zstd (optional), and brotli (optional) codecs in the async transport.

• Micrometer/OTel observations & metrics (optinal).

• Off-lock connection disposal by the classic pooling connection manager. Experimental.

• SCRAM-SHA-256 authentication scheme (RFC 7804). Experimental.

• Request Priority support (RFC 9218). Experimental.

Compatibility notes:

• As of this version, HttpClient uses BUILTIN HostnameVerificationPolicy by default, delegating
  host verification to JSSE security manager. One must explicitly configure the TLS strategy
  to continue using the hostname verifier shipped with HttpClient.

• Five-second TCP keep-alive is now enabled by default.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud