Bug 2496769 (CVE-2026-8927) - CVE-2026-8927 curl: Information disclosure due to uncleared proxy authentication state
Summary: CVE-2026-8927 curl: Information disclosure due to uncleared proxy authenticat...
Keywords:
Status: NEW
Alias: CVE-2026-8927
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2497474 2509284 2509288 2509281 2509282 2509283 2509285 2509286 2509287 2509289
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-03 07:02 UTC by OSIDB Bzimport
Modified: 2026-09-28 14:23 UTC (History)
39 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:69707 0 None None None 2026-09-21 22:24:58 UTC
Red Hat Product Errata RHBA-2026:70194 0 None None None 2026-09-22 11:37:01 UTC
Red Hat Product Errata RHBA-2026:70266 0 None None None 2026-09-22 14:51:51 UTC
Red Hat Product Errata RHBA-2026:70696 0 None None None 2026-09-23 10:58:46 UTC
Red Hat Product Errata RHBA-2026:70831 0 None None None 2026-09-23 14:14:30 UTC
Red Hat Product Errata RHSA-2026:55432 0 None None None 2026-08-17 04:31:24 UTC
Red Hat Product Errata RHSA-2026:56869 0 None None None 2026-08-19 13:28:40 UTC
Red Hat Product Errata RHSA-2026:69126 0 None None None 2026-09-21 14:15:04 UTC
Red Hat Product Errata RHSA-2026:72506 0 None None None 2026-09-28 14:23:53 UTC

Description OSIDB Bzimport 2026-07-03 07:02:07 UTC 
When reusing a libcurl handle for sequential transfers driven by
environment-variable proxy configuration, libcurl fails to clear the proxy
authentication state between requests. Specifically, if the initial transfer
authenticates against `proxyA` using Digest auth, a subsequent transfer routed
through `proxyB` erroneously leaks the `Proxy-Authorization:` header intended
solely for `proxyA`.
Comment 4 errata-xmlrpc 2026-08-17 04:31:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:55432 https://access.redhat.com/errata/RHSA-2026:55432
Comment 5 errata-xmlrpc 2026-08-19 13:28:38 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services 2.4.62.SP5

Via RHSA-2026:56869 https://access.redhat.com/errata/RHSA-2026:56869
Comment 7 Jon Orris 2026-09-21 14:15:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:69126 https://access.redhat.com/errata/RHSA-2026:69126
Comment 8 Jon Orris 2026-09-28 14:23:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:72506 https://access.redhat.com/errata/RHSA-2026:72506
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