Is there a public exploit for CVE-2026-119135?

No public exploit for CVE-2026-119135 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-119135?

CVE-2026-119135 scores CVSS 5.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.21%.

What does CVE-2026-119135 affect?

CVE-2026-119135 affects bytecodealliance wasmtime.

5.9 Medium

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 panics when the host reads a component model stream as a different Rust item type…

CVE-2026-119135

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 panics when the host reads a component model stream as a different Rust item type than it was created with, because the host-to-host read path asserts matching TypeIds instead of returning an error. Guest code can return a host-created StreamReader that the embedder reads as StreamReader , where both types map to the same component model type, crashing the embedding process.

Assessment

CVSS: 5.9 (v4.0)
Severity: Medium
EPSS: 0.21% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 29 October 2026
Last updated: 4 November 2026
Affected: bytecodealliance · wasmtime
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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