High
httpcomponents-client — security advisory
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
- Products
- httpcomponents-client
- Affected versions
- 4.2.5-2, 4.3.2-1, 4.3.3-1, 4.3.3-1ubuntu0.1, 4.3.3-1ubuntu0.1+esm1, 4.3.3-1ubuntu0.1+esm2, 4.4.1-1, 4.5.1-1, 4.5.1-1ubuntu0.1~esm1, 4.5.10-2, 4.5.11-1, 4.5.11-1ubuntu0.1~esm1, 4.5.13-2, 4.5.13-3, 4.5.14-1, 4.5.14-1build1, 4.5.3-1, 4.5.4-1, 4.5.5-1, 4.5.5-1ubuntu0.1~esm1, 4.5.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40542
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:43 UTC · Revision 1
Source evidence
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
osv:UBUNTU-CVE-2026-40542
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
Complete source record
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"modified": "2026-10-17T12:58:53.771398033Z",
"provider": "osv",
"upstream": [
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"https://www.cve.org/CVERecord?id=CVE-2026-40542",
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"source_id": "core-osv",
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"published_at": "2026-04-22T08:16:00+00:00"
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