CVE-2025-15411
Published: 01 January 2026
Summary
CVE-2025-15411 is a medium-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Webassembly Wabt. Its CVSS base score is 4.8 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 9.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SA-22 (Unsupported System Components) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-15411 is a memory corruption vulnerability (CWE-119) affecting WebAssembly's wabt toolkit in versions up to 1.0.39. The issue resides in the wabt::AST::InsertNode function within the wasm-decompile component, specifically in the file /src/repro/wabt/bin/wasm-decompile.
The vulnerability can be exploited on the local host by an attacker with low privileges, under conditions of low attack complexity and no user interaction required. Exploitation results in memory corruption, yielding limited impacts on confidentiality, integrity, and availability, as reflected in its CVSS 3.1 base score of 5.3 (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
Advisories note that a public exploit is available and could be used in attacks, with references including the wabt GitHub repository, issue #2679, and a proof-of-concept at github.com/oneafter/1208/blob/main/af1, alongside VulDB entries. The project lacks an active maintainer, and in response to the issue report, the researcher was recommended to submit a pull request themselves; no patches or official mitigations are referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0006
Vulnerability details
A weakness has been identified in WebAssembly wabt up to 1.0.39. This vulnerability affects the function wabt::AST::InsertNode of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. This manipulation causes memory corruption. It is possible to launch the attack on the local…
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host. The exploit has been made available to the public and could be used for attacks. Unfortunately, the project has no active maintainer at the moment. In a reply to the issue report somebody recommended to the researcher to provide a PR himself.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local memory corruption in client tool enables exploitation for privilege escalation via malicious input to wasm-decompile.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements memory protection mechanisms (e.g., ASLR, DEP, guard pages) that block the memory corruption primitive in wabt::AST::InsertNode.
Requires replacement or isolation of the unsupported wabt component (no active maintainer) whose unpatched memory-corruption flaw is publicly exploitable.
Mandates timely application of patches or mitigations for the documented flaw in wasm-decompile, directly addressing the publicly disclosed CVE.