CVE catalog

CVE-2026-27572

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 to

[CVE catalog]

Severity
Medium · CVSS 6.9
Published
Source
[NVD] · [CVE record]
EPSS
0.52% · Oct 25, 2026

A flaw was found in Wasmtime, a runtime for WebAssembly. This vulnerability allows an attacker to cause a Denial of Service (DoS) by sending an excessive number of HTTP header fields. The Wasmtime implementation of the `wasi:http/types.fields` resource does not gracefully handle this condition, leading to a system panic and making the application unavailable. wasmtime: Wasmtime: Denial of Service via excessive HTTP header fields 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-2026-27572Not 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]