How severe is CVE-2026-2327?

CVE-2026-2327 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-2327 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2327?

CVE-2026-2327 affects Markdown-it Project Markdown-it. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2327 have an EU (EUVD) identifier?

Yes. CVE-2026-2327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7037.

When was CVE-2026-2327 published?

CVE-2026-2327 was published on 2026-02-12 and last updated on 2026-06-17.

CVE-2026-2327

CVE-2026-2327 is a medium-severity vulnerability in Markdown-it Project Markdown-it with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 5.5
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7037
Weakness: CWE-1333
Affected product: Markdown-it Project Markdown-it
Published: 2026-02-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-2327?: 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.
How severe is CVE-2026-2327?: CVE-2026-2327 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-2327 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2327?: CVE-2026-2327 affects Markdown-it Project Markdown-it. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2327?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2327 have an EU (EUVD) identifier?: Yes. CVE-2026-2327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7037.
When was CVE-2026-2327 published?: CVE-2026-2327 was published on 2026-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:markdown-it_project:markdown-it:*:*:*:*:*:*:*:*

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