VDB-345729 · CVE-2026-2327 · Nessus 299039

markdown-it up to 14.1.0 linkify redos

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in markdown-it up to 14.1.0. Affected is the function linkify. Performing a manipulation results in redos. This vulnerability is cataloged as CVE-2026-2327. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in markdown-it up to 14.1.0. This affects the function linkify. The manipulation with an unknown input leads to a redos vulnerability. CWE is classifying the issue as CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. This is going to have an impact on availability. The summary by CVE is:

Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.

The advisory is shared at security.snyk.io. This vulnerability is uniquely identified as CVE-2026-2327 since 02/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1449.003 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 299039 (Linux Distros Unpatched Vulnerability : CVE-2026-2327), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 14.1.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (299039) and CERT Bund (WID-SEC-2026-0574). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

IBM App Connect Enterprise

Productinfo

Name

markdown-it

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector (snyk): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 299039
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-2327

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: markdown-it 14.1.1

Timelineinfo

02/11/2026 CVE reserved
02/12/2026 +1 days Advisory disclosed
02/12/2026 +0 days VulDB entry created
03/03/2026 +19 days VulDB entry last update

Sourcesinfo

Advisory: SNYK-JS-MARKDOWNIT-10666750
Status: Confirmed

CVE: CVE-2026-2327 (🔒)
GCVE (CVE): GCVE-0-2026-2327
GCVE (VulDB): GCVE-100-345729
CERT Bund: WID-SEC-2026-0574 - IBM App Connect Enterprise: Mehrere Schwachstellen

Entryinfo

Created: 02/12/2026 06:56
Updated: 03/03/2026 12:44
Changes: 02/12/2026 06:56 (77), 02/13/2026 10:19 (2), 02/14/2026 18:40 (2), 02/23/2026 15:48 (12), 03/03/2026 12:44 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.