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In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by spec they should be checked with a case-insensitive comparis — CVE-2024-5699

Date
Source
MSRC
Vendor
Microsoft
Threat
critical
CVSS
9.8

Summary

Advisory CVE-2024-5699. In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by spec they should… Vendor: Microsoft. Source: MSRC. Threat: critical. CVSS 9.8. See the…

What to do

General, cautious steps (verify details in the official source):

  • Prioritize patching or mitigation immediately (treat as actively risky).
  • Identify affected product versions in your inventory and verify whether you are impacted.
  • Apply vendor patches/updates or recommended mitigations as soon as available.
  • Read the official advisory for exact affected versions and remediation steps.

Official advisory

Read the official source

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