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CVE-2022-31100

22
FAUCET Score

CVE-2022-31100 is a Denial of Service (DoS) vulnerability affecting rulex, a regular expression language, and its implementations like pomsky_lang and pomsky. It occurs when parsing untrusted rulex expressions containing multi-byte UTF-8 code points, leading to application crashes. Rated 6.5 MEDIUM (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), this vulnerability can be exploited remotely with low attack complexity, resulting in high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.3CPE matchmatch criteria
cpe:2.3:a:pomsky-lang:pomsky:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 65th percentile among its peer group of 21,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: rulexFixed in: 0.4.3

Vendor Advisories (1)

rustGHSA-8v9w-p43c-r885medium

Reachable Assertion in rulex

Jun 21, 2022

References

github.com / rulex-rs/rulex/commit/fac6d58b25c6f9f8c0a6cdc4dec75b37b219f1d6
PatchThird Party Advisory
github.com / rulex-rs/rulex/security/advisories/GHSA-8v9w-p43c-r885
MitigationThird Party Advisory