CVE-2026-42899

HIGH
Published May 12, 2026 Modified May 13, 2026 CWE-835

Description

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0004
Probability of exploitation
0.11%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-835 CWE-835

Affected Products

Vendor Product
microsoft .net
microsoft .net
microsoft .net
apple macos
linux linux_kernel
microsoft windows

References

Frequently Asked Questions

What is CVE-2026-42899? +
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-42899? +
CVE-2026-42899 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0004, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-42899? +
CVE-2026-42899 affects products from apple, linux, microsoft, specifically: .net, linux_kernel, macos, windows. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-42899? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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