CVE-2022-31100Network attack vector

Service crash via improper UTF-8 slicing

Published Jun 27, 2022 · Updated Apr 23, 2025

Denial of service in Pomsky before 0.4.3 allows remote authenticated users to crash parsing threads via crafted Rulex expressions. The parse_quoted_text routine and tokenizer advance UTF-8 input slices using fixed byte counts, so a multibyte code point creates an invalid byte boundary and triggers a Rust panic. Exploitation requires a service to accept untrusted Rulex expressions and to let a parser-thread panic interrupt availability; direct data access or modification is not reported.

CVSS severity6.5
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Pomsky before 0.4.3 allows remote authenticated users to crash parsing threads via crafted Rulex expressions. The parse_quoted_text routine and tokenizer advance UTF-8 input slices using fixed byte counts, so a multibyte code point creates an invalid byte boundary and triggers a Rust panic. Exploitation requires a service to accept untrusted Rulex expressions and to let a parser-thread panic interrupt availability; direct data access or modification is not reported.

The record

CVE
CVE-2022-31100
Published
Jun 27, 2022
Updated
Apr 23, 2025
Vendor
Pomsky
Product
Pomsky
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pomsky · Pomskyversion=< 0.4.3

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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