ALPINE-CVE-2026-8927

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-8927
Published: 03 Jul 2026, 07:16
Last modified:08 Jul 2026, 09:30

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Jul 2026, 07:16
Published
Vulnerability first disclosed
08 Jul 2026, 09:30
Last Modified
Vulnerability information updated

Description

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`.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Systems

  • alpine•curl

    ≥ 7.12.0, < 8.21.0-r0

References (1)