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High 7.5Published May 12, 2026
CVE-2026-42899ASP.NET Core Denial of Service Vulnerability
Updated under an hour ago ()
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It affects Microsoft .NET 10.0 and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVSS
- 7.5 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Modified
- Record last updated
- Aug 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft .NET 10.0 microsoft:net_10.0 (from the name) | from 10.0.0 before 10.0.8 | CNA record |
Microsoft .NET 8.0 microsoft:net_8.0 (from the name) | from 8.0.0 before 8.0.27 | CNA record |
Microsoft .NET 9.0 microsoft:net_9.0 (from the name) | from 9.0.0 before 9.0.16 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:8.0.127-1.el10_2 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:8.0.127-1.el10_0 not affected | CISA ADP |
from 0:8.0.127-1.el9_4 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:8.0.127-1.el9_6 not affected | CISA ADP |
Red Hat Red Hat Hardened Images redhat:hummingbird | from 10.0.108-1.hum1 not affected | CISA ADP |
microsoft .net microsoft:.net | from 8.0.0 before 8.0.27; from 9.0.0 before 9.0.16; from 10.0.0 before 10.0.8 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899vendor-advisory, patch
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.