Is CVE-2026-27572 actively exploited?

No active exploitation of CVE-2026-27572 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27572 be exploited remotely?

Yes. CVE-2026-27572 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27572?

CVE-2026-27572 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.07%.

HOME VULNERABILITIESCVE-2026-27572

HIGH

CVE-2026-27572

CWE-770Published: February 24, 2026· Updated: Feb 25, 2026

7.5

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:20.7th

Official Description

Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of the `wasi:http/types.fields` resource is susceptible to panics when too many fields are added to the set of headers. Wasmtime's implementation in the `wasmtime-wasi-http` crate is backed by a data structure which panics when it reaches excessive capacity and this condition was not handled gracefully in Wasmtime. Panicking in a WASI implementation is a Denial of Service vector for embedders and is treated as a security vulnerability in Wasmtime. Wasmtime 24.0.6, 36.0.6, 40.0.4, 41.0.4, and 42.0.0 patch this vulnerability and return a trap to the guest instead of panicking. There are no known workarounds at this time. Embedders are encouraged to update to a patched version of Wasmtime.

NVD Source

Technical Analysis

CVE-2026-27572 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.