CVE-2026-126410
- Source
- https://cve.org/CVERecord?id=CVE-2026-126410
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126410.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-126410
- Aliases
-
- GHSA-hmmr-87qq-258j
- RUSTSEC-2026-0420
- Downstream
- Published
- 2026-11-13T09:35:41Z
- Modified
- 2026-11-14T02:56:04Z
- Severity
-
- 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N CVSS Calculator
- Summary
- Wasmtime 48.0.0 before 48.0.8 TOCTOU UDP Send Policy Bypass via wasip3 Sockets
- Details
-
Wasmtime's wasmtime-wasi crate 48.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains a time-of-check/time-of-use race in the wasip3 wasi:sockets udp-socket host implementation that lets guests bypass socket_addr_check send restrictions. A malicious guest can race udp-socket.send against udp-socket.connect to deliver attacker-controlled datagrams to addresses the policy permits only for receiving.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-367" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126410.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126410.json
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hmmr-87qq-258j
- https://nvd.nist.gov/vuln/detail/CVE-2026-126410
- https://www.vulncheck.com/advisories/wasmtime-48.0.0-before-48.0.8-toctou-udp-send-policy-bypass-via-wasip3-sockets
Affected packages
Git / github.com/bytecodealliance/wasmtime
Affected ranges
- Type
- GIT
- Repo
- https://github.com/bytecodealliance/wasmtime
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "48.0.0" }, { "fixed": "48.0.8" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "introduced": "49.0.0" }, { "fixed": "49.0.5" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "introduced": "50.0.0" }, { "fixed": "50.0.1" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" } ] }