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undici: undici: Weakening of cookie SameSite policy due to incorrect parsing of Set-Cookie header

🗓️ 06 Jul 2026 15:07:52Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 7 Views

Undici incorrectly parses Set-Cookie headers, allowing downgrade of SameSite to a weaker policy.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64nodejs1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-1:22.23.1-1.module+el9.8.0+24457+996af7aa.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lenodejs1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-1:22.23.1-1.module+el9.8.0+24457+996af7aa.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xnodejs1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-1:22.23.1-1.module+el9.8.0+24457+996af7aa.s390x.rpm
Red Hat Enterprise Linux9.8x86_64nodejs1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-1:22.23.1-1.module+el9.8.0+24457+996af7aa.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64nodejs-debuginfo1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debuginfo-1:22.23.1-1.module+el9.8.0+24457+996af7aa.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lenodejs-debuginfo1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debuginfo-1:22.23.1-1.module+el9.8.0+24457+996af7aa.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xnodejs-debuginfo1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debuginfo-1:22.23.1-1.module+el9.8.0+24457+996af7aa.s390x.rpm
Red Hat Enterprise Linux9.8x86_64nodejs-debuginfo1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debuginfo-1:22.23.1-1.module+el9.8.0+24457+996af7aa.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64nodejs-debugsource1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debugsource-1:22.23.1-1.module+el9.8.0+24457+996af7aa.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lenodejs-debugsource1:22.23.1-1.module+el9.8.0+24457+996af7aanodejs-debugsource-1:22.23.1-1.module+el9.8.0+24457+996af7aa.ppc64le.rpm
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16 Jul 2026 10:18Current
7High risk
Vulners AI Score7
CVSS 3.13.7
EPSS0.00248
SSVC
7