Cleartext Transmission of Sensitive Information Affecting curl-8.17.0 package, versions <8.17.0+e1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-CURL8170-21280207
  • published20 Oct 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-6276  (opens in a new tab)
CWE-319  (opens in a new tab)

How to fix?

Upgrade Echo:latest curl-8.17.0 to version 8.17.0+e1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl-8.17.0 package and not the curl-8.17.0 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Using libcurl, when a custom Host: header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom Host: header set, the second request would use stale information and pass on cookies meant for the first host in the second request. Leak them.

CVSS Base Scores

version 3.1