CVE-2020-26298

unknown

Published 2021-01-11 · Modified 2026-03-13

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CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

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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.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`3.5.1-1`
debian	bullseye	fixed	`3.5.1-1`
debian	forky	fixed	`3.5.1-1`
debian	sid	fixed	`3.5.1-1`
debian	trixie	fixed	`3.5.1-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
RubyGems	redcarpet	`<>= 3.5.1`	`>= 3.5.1`
RubyGems	redcarpet	`<3.5.1`	`3.5.1`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.