Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The System.Text.Json package, versions 7.0.0 through 8.0.3, is vulnerable to a denial of service when the JsonSerializer.DeserializeAsyncEnumerable method is called on untrusted input. The source does not describe the attacker's required access or the exact effect beyond denial of service. Upgrade System.Text.Json to 8.0.4 or later.
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
- 9 Jul 2024, 17:22 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 15:21 UTC First seen by agentprime
- 31 Oct 2026, 15:21 UTC Confirmed by OSV