CVE
CVE-2026-8927
env-set cross-proxy Digest auth state leak
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.
Package Versions Affected
Package Version
patch Availability
No items found.
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
-
Related Resources
No items found.
References
https://curl.se/docs/CVE-2026-8927.html, https://curl.se/docs/CVE-2026-8927.json, https://hackerone.com/reports/3744543, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8927.json, https://nvd.nist.gov/vuln/detail/CVE-2026-8927