CVE-2026-64607

mediumCVSS 5.3covered by 1 sourcefirst seen 2026-07-31

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.

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Exploitation outlook

Low exploitation risk0.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-64607: HttpClient based on the classic i/o model fails to correctly release the underlying connection…nvd · 2026-07-31

External references

NVD record for CVE-2026-64607

CVE.org record

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