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CVE-2023-31670

23
FAUCET Score

CVE-2023-31670 is a Denial of Service (DoS) vulnerability affecting wasm2c, wasm2wat, wasm-decompile, and wasm-validate versions 1.0.32 within the WebAssembly Binary Toolkit. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely without authentication or user interaction by processing a specially crafted binary, leading to service disruption. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.32CPE matchmatch criteria
cpe:2.3:a:webassembly:webassembly_binary_toolkit:1.0.32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.83%
Probability of exploitation in next 30 days
EPSS Percentile
53.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0083 is in the 29th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

github_advisoryvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: firefox
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: thunderbird
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: thunderbird

Vendor Advisories (2)

microsoft2023-May/CVE-2023-31670Important

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.

May 9, 2023
redhatCVE-2023-31670Moderate

wasm2c: DoS via crafted binary

Apr 14, 2023

References

github.com / WebAssembly/wabt/issues/2199
ExploitIssue TrackingVendor Advisory