CVE-2026-67339

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Source
https://cve.org/CVERecord?id=CVE-2026-67339
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67339.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67339
Aliases
Downstream
Published
2026-08-01T12:22:17.139Z
Modified
2026-08-02T03:47:51.104861757Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
guzzlehttp/guzzle before 7.14.2 Proxy-Authorization Header Disclosure
Details

guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin servers in cURL handlers. Attackers can capture proxy credentials through origin server access logs when requests are redirected, bypassed, or sent through SOCKS proxies that Guzzle misclassifies as direct connections.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67339.json",
    "cwe_ids": [
        "CWE-200"
    ],
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/guzzle/guzzle

Affected ranges

Type
GIT
Repo
https://github.com/guzzle/guzzle
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fa88c57803501ad0770f5cddb1e60525d49da9a1
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.14.2"
        }
    ]
}

Affected versions

4.*
4.0.0
4.0.0-rc.1
4.0.0-rc.2
4.0.1
4.0.2
4.1.0
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.2.0
4.2.1
4.2.2
4.2.3
5.*
5.0.0
5.0.1
5.0.2
5.0.3
5.1.0
5.2.0
5.3.0
6.*
6.0.0
6.0.1
6.0.2
6.1.0
6.1.1
6.2.0
6.2.1
6.2.2
6.3.0
6.3.1
6.3.2
6.3.3
6.4.0
6.4.1
6.5.0
7.*
7.0.0
7.0.0-beta.1
7.0.0-beta.2
7.0.0-rc.1
7.1.0
7.1.1
7.10.0
7.11.0
7.13.0
7.13.1
7.14.0
7.14.1
7.2.0
7.3.0
7.4.0
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
7.5.0
7.5.1
7.6.0
7.6.1
7.7.0
7.8.0
7.8.1
7.9.0
7.9.1
7.9.2
7.9.3
v1.*
v1.0.0
v1.0.0beta1
v1.0.1
v1.0.2
v1.0.3
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.5.0
v2.6.0
v2.6.1
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.7.0
v2.7.1
v2.7.2
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5
v2.8.6
v2.8.7
v2.8.8
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.1.0
v3.1.1
v3.1.2
v3.2.0
v3.3.0
v3.3.1
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.5.0
v3.6.0
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4
v3.8.0
v3.8.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67339.json"