Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
System.Security.Cryptography.Cose, System.IO.Packaging and Microsoft.Extensions.Caching.Memory can be exposed to hostile input that triggers hash flooding, causing denial of service. Upgrade to 8.0.1 or 9.0.0-rc.2.24473.5, or to 6.0.1 or 6.0.2 on .NET 6.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C | CNA (microsoft) |
- CISA KEV Not listed.
- EPSS 0.029, the 87th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 8 Oct 2024, 17:28 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 15:23 UTC First seen by agentprime
- 31 Oct 2026, 15:23 UTC Confirmed by OSV