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SCA: security update for guzzlehttp/guzzle (GHSA-wpwq-4j6v-78m3)

medium Tenable Cloud Security Plugin ID 443607

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, in certain configurations, traffic expected to
 be protected by TLS on the hop to the proxy is transmitted in cleartext. Proxy authentication credentials
 (the Proxy-Authorization header, proxy userinfo in the proxy URL, or CURLOPT_PROXYUSERPWD) are sent
 without encryption, and the CONNECT target host and port for tunneled HTTPS requests are exposed. The
 built-in cURL handlers (GuzzleHttp\Handler\CurlHandler and GuzzleHttp\Handler\CurlMultiHandler, used by
 default whenever the PHP cURL extension is available) accept an https:// proxy. libcurl older than 7.50.2
 silently treats an https:// proxy as a plaintext http:// proxy. The TLS connection to the proxy is never
 established, and the proxy leg is cleartext with no error or warning. An application is affected when it
 sends requests through one of the built-in cURL handlers, configures an https:// proxy expecting the proxy
 connection itself to be encrypted, and runs with libcurl older than 7.50.2. This vulnerability is fixed in
 7.12.1. (CVE-2026-55568)

Solution

Update the guzzlehttp/guzzle library and its related packages to version 7.12.1 or later.

See Also

https://github.com/advisories/GHSA-wpwq-4j6v-78m3

Plugin Details

Severity: Medium

ID: 443607

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 6/19/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-55568

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2026

Vulnerability Publication Date: 6/19/2026

Reference Information

CVE: CVE-2026-55568