JLSEC-2026-1353

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Source
https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1353.md
Import Source
https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1353.json
JSON Data
https://api.osv.dev/v1/vulns/JLSEC-2026-1353
Upstream
  • EUVD-2026-8569
Published
2026-08-21T20:43:33.133Z
Modified
2026-08-21T21:14:20.644203302Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
Wasmtime can panic when adding excessive fields to a `wasi:http/types.fields` instance
Details

Impact

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.

Patches

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.

Workarounds

There are no known workarounds at this time, embedders are encouraged to update to a patched version of Wasmtime.

Resources

Database specific 
{
    "sources": [
        {
            "imported": "2026-08-21T20:09:02.075Z",
            "published": "2026-02-24T22:16:32.687Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27572",
            "id": "CVE-2026-27572",
            "database_specific": {
                "status": "Analyzed"
            },
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27572",
            "affected": {
                "bytecodealliance:wasmtime": [
                    "< 24.0.6",
                    ">= 25.0.0, < 36.0.6",
                    ">= 37.0.0, < 40.0.4",
                    ">= 41.0.0, < 41.0.4"
                ]
            },
            "modified": "2026-06-17T10:27:19.773Z"
        },
        {
            "imported": "2026-08-21T20:09:07.458Z",
            "published": "2026-02-24T21:08:06Z",
            "url": "https://api.github.com/advisories/GHSA-243v-98vx-264h",
            "html_url": "https://github.com/advisories/GHSA-243v-98vx-264h",
            "id": "GHSA-243v-98vx-264h",
            "modified": "2026-02-27T20:25:49Z"
        },
        {
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8569",
            "affected": {
                "bytecodealliance:wasmtime": [
                    "25.0.0, < 36.0.6",
                    "37.0.0, < 40.0.4",
                    "41.0.0, < 41.0.4",
                    "< 24.0.6"
                ]
            },
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-8569",
            "published": "2026-02-24T21:31:50Z",
            "imported": "2026-08-21T20:09:03.524Z",
            "id": "EUVD-2026-8569",
            "modified": "2026-02-27T20:55:29Z"
        }
    ],
    "license": "CC-BY-4.0"
}
References
Credits

Affected packages

Julia / Wasmtime_jll

Package

Name
Wasmtime_jll
Purl
pkg:julia/Wasmtime_jll?uuid=d20e7296-4f3e-515c-90b9-d2595a77bf72

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
45.0.1+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1353.json"