CVE-2026-67353

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Source
https://cve.org/CVERecord?id=CVE-2026-67353
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67353.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67353
Aliases
Downstream
Published
2026-08-01T12:22:17.339Z
Modified
2026-08-03T03:45:45.145829925Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
guzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of Service
Details

guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.

Database specific 
{
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67353.json",
    "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
61443dfb33c62f308ee8add20f45b4d6e4bf8d2f
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.15.1"
        }
    ]
}

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
7.15.0
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-2026-67353.json"