How severe is CVE-2026-41680?

CVE-2026-41680 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2026-41680 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41680?

CVE-2026-41680 affects Marked Project Marked. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41680?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-41680 have an EU (EUVD) identifier?

Yes. CVE-2026-41680 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25585.

When was CVE-2026-41680 published?

CVE-2026-41680 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-41680

CVE-2026-41680 is a high-severity vulnerability in Marked Project Marked with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25585
Weakness: CWE-400
Affected product: Marked Project Marked
Published: 2026-04-24
Last modified: 2026-06-17

Description

Marked is a markdown parser and compiler. From 18.0.0 to 18.0.1, a critical Denial of Service (DoS) vulnerability exists in marked. By providing a specific 3-byte input sequence a tab, a vertical tab, and a newline (\x09\x0b\n)—an unauthenticated attacker can trigger an infinite recursion loop during parsing. This leads to unbounded memory allocation, causing the host Node.js application to crash via Memory Exhaustion (OOM). This vulnerability is fixed in 18.0.2.

Frequently asked questions

What is CVE-2026-41680?: Marked is a markdown parser and compiler. From 18.0.0 to 18.0.1, a critical Denial of Service (DoS) vulnerability exists in marked. By providing a specific 3-byte input sequence a tab, a vertical tab, and a newline (\x09\x0b\n)—an unauthenticated attacker can trigger an infinite recursion loop during parsing. This leads to unbounded memory allocation, causing the host Node.js application to crash via Memory Exhaustion (OOM). This vulnerability is fixed in 18.0.2.
How severe is CVE-2026-41680?: CVE-2026-41680 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2026-41680 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41680?: CVE-2026-41680 affects Marked Project Marked. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41680?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-41680 have an EU (EUVD) identifier?: Yes. CVE-2026-41680 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25585.
When was CVE-2026-41680 published?: CVE-2026-41680 was published on 2026-04-24 and last updated on 2026-06-17.

References

https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7

Affected products (1)

cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:*

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