CVE-2026-40542
high
CVSS v3
7.3
CVSS v4 NEW
—
VIR risk
7.3
Description
Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification
Predictions
Exploit likelihood
82%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 0 |
| debian | sid | fixed | 0 |
| debian | trixie | fixed | 0 |
| sles | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.httpcomponents.client5:httpclient5 | >=5.6-alpha1,<5.6.1 | 5.6.1 |
| MAVEN | org.apache.httpcomponents.client5:httpclient5 | >= 5.6-alpha1, < 5.6.1 | 5.6.1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| apache | httpclient | 5.6 | |
References
- https://lists.apache.org/thread/tfmgv86xr0z1y096vs3z0y315t1v3o97
- http://www.openwall.com/lists/oss-security/2026/04/22/5
- https://security-tracker.debian.org/tracker/CVE-2026-40542
- https://nvd.nist.gov/vuln/detail/CVE-2026-40542
- https://github.com/apache/httpcomponents-client/commit/726eac2323d370435d8afca1e0540aa099927f18
- https://github.com/apache/httpcomponents-client
- https://www.suse.com/security/cve/CVE-2026-40542.html
- https://github.com/advisories/GHSA-v468-qcjx-r72w
CWEs
CWE-304
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.