VulnerabilityModified
CVE-2026-42899
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
HIGH 7.5EPSS 2.43%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.43% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- microsoft/.net
- Source
- secure@microsoft.com
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:17464
- https://access.redhat.com/errata/RHSA-2026:17527
- https://access.redhat.com/errata/RHSA-2026:17682
- https://access.redhat.com/errata/RHSA-2026:21286
- https://access.redhat.com/errata/RHSA-2026:21291
- https://access.redhat.com/errata/RHSA-2026:21293
- https://access.redhat.com/errata/RHSA-2026:21294
- https://access.redhat.com/errata/RHSA-2026:21295
- https://access.redhat.com/errata/RHSA-2026:21296
- https://access.redhat.com/errata/RHSA-2026:21297
- https://access.redhat.com/errata/RHSA-2026:21754
- https://access.redhat.com/errata/RHSA-2026:22145
- https://access.redhat.com/errata/RHSA-2026:24332
- https://access.redhat.com/errata/RHSA-2026:24333
- https://access.redhat.com/errata/RHSA-2026:24334
- https://access.redhat.com/errata/RHSA-2026:24335
- https://access.redhat.com/errata/RHSA-2026:24336
- https://access.redhat.com/security/cve/CVE-2026-42899
- https://bugzilla.redhat.com/show_bug.cgi?id=2476605
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42899.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.