CVE-2020-7760

Regular Expression Denial of Service (ReDoS)

5.3 MediumFix available

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|/.?/)

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

5.30%Up 3.1 points since Apr 14, 2021

What each source reports

CVE List Score used 5.3

Regular Expression Denial of Service (ReDoS)

Record: CVE-2020-7760
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Updated: 2026-11-02

EUVDEUVD-2021-0941 5.3

Record: EUVD-2021-0941
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4gw3-8f77-f72c 5.3

Regular expression denial of service in codemirror

Record: GHSA-4gw3-8f77-f72c
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400
Updated: 2026-11-02

NVD 5.3

Record: CVE-2020-7760
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

OSV 7.5

Record: CVE-2020-7760
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-7760 7.5

Record: DEBIAN-CVE-2020-7760
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVGHSA-4gw3-8f77-f72c 5.3

Regular expression denial of service in codemirror

Record: GHSA-4gw3-8f77-f72c
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-7760 5.3

Record: UBUNTU-CVE-2020-7760
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`codemirror` npm	before 5.58.2	5.58.2
`codemirror-js` Debian:12	before 5.58.2+~cs0.23.101-1	5.58.2+~cs0.23.101-1
`codemirror-js` Debian:13	before 5.58.2+~cs0.23.101-1	5.58.2+~cs0.23.101-1
`codemirror-js` Debian:14	before 5.58.2+~cs0.23.101-1	5.58.2+~cs0.23.101-1
`codemirror-js` Debian:10	before 5.43.0-1+deb10u1, plus listed versions 5.43.0-1	5.43.0-1+deb10u1
`codemirror-js` Ubuntu:16.04:LTS	All versions, plus listed versions 5.4.0-1	None known
`codemirror-js` Ubuntu:18.04:LTS	All versions, plus listed versions 5.4.0-15.19.0-1	None known
`codemirror-js` Ubuntu:20.04:LTS	All versions, plus listed versions 5.43.0-15.49.2-15.50.2-15.51.0-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-7760 is a medium vulnerability (CVSS 5.3) in Codemirror, published October 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.30%, the 92nd percentile. Fixed in codemirror 5.58.2.

References

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