Buffer overflow in wasm3

published 2022-05-20 4 y ago modified 2026-06-17 4 mo ago also GHSA-77fq-4xf5-hph4 , PYSEC-2022-43154 , EUVD-2022-0226

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits: 0; none known

WASM3 v0.5.0 was discovered to contain a heap overflow via the component /wabt/bin/poc.wasm.

Patch / fix

links 2

github.com/wasm3/wasm3@8441c82 commit
github.com/wasm3/wasm3#324 pull request

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/wasm3/wasm3/issues/323 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	pywasm3	<=0.5.0	no fix listed

Classification

Weakness

CWE-787 Out-of-bounds Write

References

github.com /wasm3/wasm3/pull/324
web, patch, third-party-advisory
github.com /wasm3/wasm3/commit/8441c82c4a98f554b12971450220b580c3c2b6df
web
github.com /wasm3/wasm3/issues/323
web, exploit, issue-tracking, third-party-advisory, report
nvd.nist.gov /vuln/detail/CVE-2022-28990
advisory
github.com /pypa/advisory-database/tree/main/vulns/pywasm3/PYSEC-2022-43154.yaml
web
github.com /wasm3/wasm3
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary