Is there a public exploit for CVE-2026-54913?

No public exploit for CVE-2026-54913 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-2026-54913?

CVE-2026-54913 scores CVSS 6.9 (v4.0), rated medium.

What does CVE-2026-54913 affect?

CVE-2026-54913 affects bytecodealliance wasm-micro-runtime.

6.9 Medium

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime.

CVE-2026-54913

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to 2.4.5, loadinitexpr in core/iwasm/interpreter/wasmloader.c accepts a non-reference heap-type byte for ref.null when WASMENABLEGC=0, while the local WASMValue curvalue union is not zero-initialized and setting refindex writes only part of it. A crafted module can declare an i64, f64, or v128 global initialized through the invalid ref.null form, causing pushconstexprstack and the later global initialization path to copy uninitialized host-stack bytes into a value readable by the guest. The classic and fast interpreters are affected in the default no-GC configuration; the GC-enabled path validates heap types. The disclosure is four bytes for i64 or f64 globals and up to twelve bytes for each v128 global. This issue is fixed in version 2.4.5.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 November 2026
Last updated: 5 November 2026
Affected: bytecodealliance · wasm-micro-runtime
Assigner: GitHub_M

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

At the source

EUVD (ENISA)

References

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