CVE-2022-31099

Name: CVE-2022-31099
Creator: NVD / NIST
Published: 2022-06-27T23:15:08.043+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.88%

Last modified Jun 17, 2026

CVE-2022-31099 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. rulex is a new, portable, regular expression language. When parsing untrusted rulex expressions, the stack may overflow, possibly enabling a Denial of Service attack. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

rulex is a new, portable, regular expression language. When parsing untrusted rulex expressions, the stack may overflow, possibly enabling a Denial of Service attack. This happens when parsing an expression with several hundred levels of nesting, causing the process to abort immediately. This is a security concern for you, if your service parses untrusted rulex expressions (expressions provided by an untrusted user), and your service becomes unavailable when the process running rulex aborts due to a stack overflow. The crash is fixed in version **0.4.3**. Affected users are advised to update to this version. There are no known workarounds for this issue.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.88%

54.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Pomsky-Lang	Pomsky	< 0.4.3

References

https://github.com/rulex-rs/rulex/commit/60aa2dc03a22d69c8800fec81f99c96958a11363Patch, Third Party Advisory
https://github.com/rulex-rs/rulex/security/advisories/GHSA-v78m-2q7v-fjqpThird Party Advisory
https://github.com/rulex-rs/rulex/commit/60aa2dc03a22d69c8800fec81f99c96958a11363Patch, Third Party Advisory
https://github.com/rulex-rs/rulex/security/advisories/GHSA-v78m-2q7v-fjqpThird Party Advisory

Timeline

Published: Jun 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-31099?

How severe is CVE-2022-31099?

CVE-2022-31099 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2022-31099?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-31099?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST