CVE-2026-67353

mediumCVSS 5.3covered by 1 sourcefirst seen 2026-08-01

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.

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Advisory coverage (1)

mediumCVE-2026-67353: guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the Cook…nvd · 2026-08-01

External references

NVD record for CVE-2026-67353

CVE.org record

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