Authentication Bypass Affecting curl-8.8.0 package, versions <8.8.0+e1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.5% (41st percentile)

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  • Snyk IDSNYK-ECHOLATEST-CURL880-21280114
  • published20 Oct 2026
  • disclosed3 Jul 2026

Introduced: 3 Jul 2026

CVE-2026-8927  (opens in a new tab)
CWE-294  (opens in a new tab)

How to fix?

Upgrade Echo:latest curl-8.8.0 to version 8.8.0+e1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl-8.8.0 package and not the curl-8.8.0 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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 Base Scores

version 3.1