Bug 2509281

Summary:	CVE-2026-8927 nushell: Information disclosure due to uncleared proxy authentication state [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Lukas Javorsky <ljavorsk>
Component:	nushell	Assignee:	Michel Lind <michel>
Status:	CLOSED CANTFIX	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	epel9	CC:	decathorpe, michel, rust-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8769b971-d276-4ed3-a339-1de08db3ef46"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-11 10:17:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2487042, 2496769

Description Lukas Javorsky 2026-07-30 13:19:55 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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 1 Michel Lind 2026-08-04 17:31:02 UTC

Reassigning from `epel10` to `epel9`: Bug filed against a branch the package never shipped on.

Comment 2 Fabio Valentini 2026-08-11 10:17:16 UTC

This is also a bug in curl, which is *linked to* by nushell, but not *included* in it.
So this issue can only be addressed in curl itself.