Update dependency org.apache.httpcomponents.client5:httpclient5 to v5.6.3 [SECURITY] (4.0)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.apache.httpcomponents.client5:httpclient5 (source)	5.6.2 → 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://github.com/apache/httpcomponents-client/commit/55733f4121f7ba26ddf04fe12739d9c15962cb94
• https://github.com/apache/httpcomponents-client/commit/ebac9512f555c4a355cad3f59ef2db69b597cc97
• https://github.com/apache/httpcomponents-client
• https://github.com/apache/httpcomponents-client/releases/tag/rel/v5.6.3
• https://github.com/apache/httpcomponents-client/releases/tag/rel/v5.7-alpha1
• https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q
• http://www.openwall.com/lists/oss-security/2026/08/13/5

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

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Release Notes

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

v5.6.3

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