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undici vulnerable to Set-Cookie SameSite attribute downgrade via permissive substring matching

🗓️ 27 Jun 2026 08:06:02Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 10 Views

Undici is vulnerable to Set-Cookie SameSite downgrade via permissive substring matching.

Related
Detection
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses undici which is vulnerable to CVE-2026-11525, CVE-2026-12151, CVE-2026-6733, CVE-2026-9679
3 Aug 202611:04
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise is vulnerable to multiple vulnerabilities due to multiple Node.js modules
31 Jul 202614:54
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ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in undici affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge.
25 Aug 202618:11
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ibm
IBM Security Bulletins		Security Bulletin:Vulnerability in Netty affects IBM Netezza Appliance
10 Aug 202612:33
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM MAS uses axios-1.15.2, protobufjs-8.0.1 and undici-7.26 which is vulnerable to multiple CVEs, and contains vulnerabilities related to missing Secure attribute on mas-redirect-uri cookie and weak HMAC Session Secret
3 Aug 202611:18
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Multiple security vulnerabilities in IBM Business Automation Manager Open Editions
30 Jul 202617:10
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in IBM Security QRadar EDR Software
27 Aug 202615:24
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in undici affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge.
25 Aug 202618:07
–ibm
nessus
Tenable Nessus		Amazon Linux 2023 : nodejs24, nodejs24-devel, nodejs24-full-i18n (ALAS2023-2026-1920)
16 Jul 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2023 : nodejs22, nodejs22-devel, nodejs22-full-i18n (ALAS2023-2026-1921)
16 Jul 202600:00
–nessus
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Vulners
Node
microsoftazl3_nodejs_24.17.0-1Range<24.17.0-2

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10 Jul 2026 21:39Current
7High risk
Vulners AI Score7
CVSS 3.13.7
EPSS0.00238
SSVC
undiciSet Cookie SameSiteSameSite downgradepermissive substring matchingmicrosoft
10