CVE-2020-26298

Name: CVE-2020-26298
Creator: NVD / NIST
Published: 2021-01-11T19:15:13.133+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.57%

Last modified Jun 17, 2026

CVE-2020-26298 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Redcarpet is a Ruby library for Markdown processing. In Redcarpet before version 3.5.1, there is an injection vulnerability which can enable a cross-site scripting attack. EPSS estimates a 1.57% chance of exploitation in the next 30 days.

Description

Redcarpet is a Ruby library for Markdown processing. In Redcarpet before version 3.5.1, there is an injection vulnerability which can enable a cross-site scripting attack. In affected versions no HTML escaping was being performed when processing quotes. This applies even when the `:escape_html` option was being used. This is fixed in version 3.5.1 by the referenced commit.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.57%

72.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redcarpet Project	Redcarpet	< 3.5.1
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/advisories/GHSA-q3wr-qw3g-3p4hThird Party Advisory
https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md#version-351-securityRelease Notes, Third Party Advisory
https://github.com/vmg/redcarpet/commit/a699c82292b17c8e6a62e1914d5eccc252272793Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00014.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFMYDIONVWATY7EB6EARDVXT47AYCRNM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNO4ZZUPGAEUXKQL4G2HRIH7CUZKPCT6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXNNWHHAPREDM3XJDACYRTK7DBMUONBI/
https://rubygems.org/gems/redcarpetProduct, Third Party Advisory
https://www.debian.org/security/2021/dsa-4831Third Party Advisory
https://github.com/advisories/GHSA-q3wr-qw3g-3p4hThird Party Advisory
https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md#version-351-securityRelease Notes, Third Party Advisory
https://github.com/vmg/redcarpet/commit/a699c82292b17c8e6a62e1914d5eccc252272793Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00014.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFMYDIONVWATY7EB6EARDVXT47AYCRNM/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNO4ZZUPGAEUXKQL4G2HRIH7CUZKPCT6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXNNWHHAPREDM3XJDACYRTK7DBMUONBI/
https://rubygems.org/gems/redcarpetProduct, Third Party Advisory
https://www.debian.org/security/2021/dsa-4831Third Party Advisory

Timeline

Published: Jan 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26298?

How severe is CVE-2020-26298?

CVE-2020-26298 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26298?

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-2020-26298?

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

Scan your code now

Source: NVD / NIST