An issue in wasm2c 1.0.32, wasm2wat 1.0.32, wasm-decompile 1.0.32, and wasm-validate…
Priority HIGH 72Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
An issue in wasm2c 1.0.32, wasm2wat 1.0.32, wasm-decompile 1.0.32, and wasm-validate 1.0.32 allows attackers to cause a Denial of Service (DoS) via running a crafted binary.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00833 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:webassembly:webassembly_binary_toolkit:1.0.32:*:*:*:*:*:*:* | 1.0.32 | Vulnerable | WebAssembly |
- cpe:2.3:a:webassembly:webassembly_binary_toolkit:1.0.32:*:*:*:*:*:*:* Versions 1.0.32 Vulnerable ·WebAssembly
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-31670
- 2026-10-03 Alias added: GHSA-q283-h7m5-gh5p
References
More Webassembly Binary Toolkit vulnerabilities
- TI-2023-15164 WebAssembly wat2wasm v1.0.32 allows attackers to cause a libc++abi.dylib crash by putting '@' before a quote ("). CVSS 3.1MEDIUM 5.5
- TI-2023-24938 WebAssembly wabt 1.0.33 contains an Out-of-Bound Memory Write in DataSegment::Drop(), which lead to segmentation fault. CVSS 3.1MEDIUM 5.5
- TI-2023-24937 WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in… CVSS 3.1MEDIUM 5.5
- TI-2025-02727 WebAssembly wabt binary-reader-interp.cc BeginFunctionBody null pointer dereference CVSS 4.0LOW 2.3
Sources
- CVE-2023-31670 · CVE Program
- CVE-2023-31670 · NVD
- FIRST EPSS
- GHSA-q283-h7m5-gh5p · GitHub Advisory Database · CC BY 4.0
- CVE-2023-31670 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences