CVE-2023-31606

highpriority · track · 41EPSS 0.015 · 74 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.51% (74th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1333USprimaryCWE-1333USCWE-1333US

exploits (1)

Public proof-of-concept and weaponised exploit code.

merbinr/CVE-2023-31606merbinr/CVE-2023-31606PoC · poc_in_github

affected products (8)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Red Hat Inc. Red Hat 3scale API Management Platform≤ 2fstec_bduRU
Ruby Team RedCloth4.0.0 → 4.3.2fstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.8fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
promptworks redcloth4.0.0 → 4.3.2nvdUScpe:2.3:a:promptworks:redcloth:*:*:*:*:*:*:*:*
RubyGems RedCloth< 4.3.3osvUSpkg:gem/RedCloth

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-qcm3-vfq5-wfr2RedCloth Regular Expression Denial of Service issue2023-06-06ghsa · osvUS
A Regular Expression Denial of Service (ReDoS) issue was discovered in the `sanitize_html` function of RedCloth gem. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2023-06-06modified 2026-06-17

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+599 more

references (16)

External citations — patches, advisories, analysis.

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