What’s Vulnerable › Vulnerabilities

CVE-2021-39176: Missing Release of Memory after Effective Lifetime in detect-character-encoding

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-31 · updated 2026-06-17
• Weakness: CWE-401

Description

detect-character-encoding is a package for detecting character encoding using ICU. In detect-character-encoding v0.3.0 and earlier, allocated memory is not released. The problem has been patched in detect-character-encoding v0.3.1.

Affected products

• sonicdoe detect-character-encoding: before 0.3.1 — fixed in 0.3.1

How to fix

Upgrade to a fixed version: sonicdoe detect-character-encoding 0.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/sonicdoe/detect-character-encoding/commit/d44356927b92e3b13e178071bf6d7c671766f588
• https://github.com/sonicdoe/detect-character-encoding/pull/6
• https://github.com/sonicdoe/detect-character-encoding/releases/tag/v0.3.1
• https://github.com/sonicdoe/detect-character-encoding/security/advisories/GHSA-5rwj-j5m3-3chj
• https://github.com/sonicdoe/detect-character-encoding/commit/d44356927b92e3b13e178071bf6d7c671766f588
• https://github.com/sonicdoe/detect-character-encoding/pull/6
• https://github.com/sonicdoe/detect-character-encoding/releases/tag/v0.3.1
• https://github.com/sonicdoe/detect-character-encoding/security/advisories/GHSA-5rwj-j5m3-3chj

Get alerted when CVE-2021-39176 or the next vulnerability affects your stack