CVE catalog

CVE-2026-27204

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 WASI host interfaces are susceptible to guest-controlled resource exha

[CVE catalog]

Severity
Medium · CVSS 6.9
Published
Source
[NVD] · [CVE record]
EPSS
0.40% · Oct 25, 2026

A flaw was found in Wasmtime. Wasmtime's implementation of WebAssembly System Interface (WASI) host interfaces is susceptible to resource exhaustion. A malicious guest can exploit this by requesting excessive resource allocations, which Wasmtime does not appropriately limit. This can lead to a Denial of Service (DoS) on the host system, making it unavailable to legitimate users. wasmtime: Wasmtime: Denial of Service via guest-controlled resource exhaustion in WASI host interfaces The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
RustwasmtimeNot reported24.0.6fixed
RustwasmtimeNot reported36.0.6fixed
RustwasmtimeNot reported40.0.4fixed
RustwasmtimeNot reported41.0.4fixed
CpewasmtimeNot reportedNot reportedunknown
Debianrust-wasmtime1326.0.1+dfsg-10vulnerable
Debianrust-wasmtime1326.0.1+dfsg-3vulnerable
Debianrust-wasmtime1326.0.1+dfsg-4vulnerable
Debianrust-wasmtime1326.0.1+dfsg-5vulnerable
Debianrust-wasmtime1326.0.1+dfsg-6vulnerable
Debianrust-wasmtime1326.0.1+dfsg-7vulnerable
Debianrust-wasmtime1326.0.1+dfsg-8vulnerable
Debianrust-wasmtime1326.0.1+dfsg-9vulnerable
Debianrust-wasmtime1327.0.0+dfsg-2vulnerable
Debianrust-wasmtime1327.0.0+dfsg-3vulnerable
Debianrust-wasmtime1327.0.0+dfsg-4vulnerable
Debianrust-wasmtime1328.0.1+dfsg-1vulnerable
Debianrust-wasmtime1328.0.1+dfsg-2vulnerable
Debianrust-wasmtime1328.0.1+dfsg-3vulnerable
Debianrust-wasmtime1329.0.1+dfsg-1vulnerable
Debianrust-wasmtime1329.0.1+dfsg-2vulnerable
Debianrust-wasmtime1329.0.1+dfsg-3vulnerable
Debianrust-wasmtime1329.0.1+dfsg-4vulnerable
Debianrust-wasmtime1329.0.1+dfsg-5vulnerable
Debianrust-wasmtime1329.0.1+dfsg-6vulnerable
Debianrust-wasmtime1329.0.1+dfsg-7vulnerable
Debianrust-wasmtime1329.0.1+dfsg-8vulnerable
Debianrust-wasmtime1336.0.11+dfsg-1vulnerable
Debianrust-wasmtime1336.0.12+dfsg-1vulnerable
Debianrust-wasmtime1336.0.12+dfsg-2vulnerable
Debianrust-wasmtime1336.0.12+dfsg-3vulnerable
Debianrust-wasmtime1336.0.13+dfsg-1vulnerable
Debianrust-wasmtime1336.0.5+dfsg-1vulnerable
Debianrust-wasmtime1336.0.5+dfsg-2vulnerable
Debianrust-wasmtime1336.0.5+dfsg-3vulnerable
Debianrust-wasmtime1336.0.5+dfsg-4vulnerable
Debianrust-wasmtime1336.0.5+dfsg-5vulnerable
Debianrust-wasmtime1336.0.6+dfsg-1vulnerable
Debianrust-wasmtime1336.0.6+dfsg-2vulnerable
Debianrust-wasmtime1336.0.6+dfsg-3vulnerable
Debianrust-wasmtime1336.0.6+dfsg-4vulnerable
Debianrust-wasmtime1336.0.6+dfsg-5vulnerable
Debianrust-wasmtime1336.0.6+dfsg-6vulnerable
Debianrust-wasmtime1336.0.6+dfsg-7vulnerable
Debianrust-wasmtime1336.0.7+dfsg-1vulnerable
Debianrust-wasmtime1336.0.8+dfsg-1vulnerable
Debianrust-wasmtime1336.0.9+dfsg-1vulnerable
Debianrust-wasmtime1336.0.9+dfsg-2vulnerable
Debianrust-wasmtime1426.0.1+dfsg-10vulnerable
Debianrust-wasmtime1426.0.1+dfsg-3vulnerable
Debianrust-wasmtime1426.0.1+dfsg-4vulnerable
Debianrust-wasmtime1426.0.1+dfsg-5vulnerable
Debianrust-wasmtime1426.0.1+dfsg-6vulnerable
Debianrust-wasmtime1426.0.1+dfsg-7vulnerable
Debianrust-wasmtime1426.0.1+dfsg-8vulnerable
Debianrust-wasmtime1426.0.1+dfsg-9vulnerable
Debianrust-wasmtime1427.0.0+dfsg-2vulnerable
Debianrust-wasmtime1427.0.0+dfsg-3vulnerable
Debianrust-wasmtime1427.0.0+dfsg-4vulnerable
Debianrust-wasmtime1428.0.1+dfsg-1vulnerable
Debianrust-wasmtime1428.0.1+dfsg-2vulnerable
Debianrust-wasmtime1428.0.1+dfsg-3vulnerable
Debianrust-wasmtime1429.0.1+dfsg-1vulnerable
Debianrust-wasmtime1429.0.1+dfsg-2vulnerable
Debianrust-wasmtime1429.0.1+dfsg-3vulnerable
Debianrust-wasmtime1429.0.1+dfsg-4vulnerable
Debianrust-wasmtime1429.0.1+dfsg-5vulnerable
Debianrust-wasmtime1429.0.1+dfsg-6vulnerable
Debianrust-wasmtime1429.0.1+dfsg-7vulnerable
Debianrust-wasmtime1429.0.1+dfsg-8vulnerable
Debianrust-wasmtime1436.0.5+dfsg-1vulnerable
Debianrust-wasmtime1436.0.5+dfsg-2vulnerable
Debianrust-wasmtime1436.0.5+dfsg-3vulnerable
Debianrust-wasmtime1436.0.5+dfsg-4vulnerable
Debianrust-wasmtime1436.0.5+dfsg-5vulnerable
Debianrust-wasmtime1436.0.6+dfsg-1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
RustwasmtimerustNot reported24.0.6Not reportedNot reportedNot reported
RustwasmtimerustNot reported36.0.6Not reportedNot reportedNot reported
RustwasmtimerustNot reported40.0.4Not reportedNot reportedNot reported
RustwasmtimerustNot reported41.0.4Not reportedNot reportedNot reported
Debianrust-wasmtimedeb1436.0.6+dfsg-1Not reportedDEBIAN-CVE-2026-27204Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

  • [librust-cranelift-dev]Affected

    Source package: [rust-wasmtime]

    Details (2)

    • 0.113.1+26.0.1+dfsg-3 · all · trixie

      Affected

      nvd · rust-wasmtime · debian · 13

    • 0.113.1+26.0.1+dfsg-3 · all · trixie

      Affected

      nvd · rust-wasmtime · debian · 13

Observed:

References

[FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]