CVE-2026-41680: Marked is a markdown parser and compiler

Q: How do I fix CVE-2026-41680?

marked: upgrade to 18.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-41680 being exploited?

CVE-2026-41680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41680 affect?

CVE-2026-41680 affects marked. Severity is high (CVSS 7.5). 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 unauthent

Q: How urgent is CVE-2026-41680?

Priority 43/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-41680 is a high-severity flaw (CVSS 7.5) affecting marked. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-400, CWE-674, CWE-835
Published	2026-04-24
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: marked project

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 18:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

marked project marked UPGRADE

Affected: >= 18.0.0 and < 18.0.2

Fixed in: 18.0.2

Safe to downgrade to: a release before 18.0.0

1. Check installed version

npm ls marked

2. UPGRADE to 18.0.2

npm install marked@">=18.0.2"

3. If no update is available yet, DOWNGRADE to a release before 18.0.0

npm view marked versions npm install marked@"<18.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41680?

marked: upgrade to 18.0.2. Exact commands for each OS are on this page.

Is CVE-2026-41680 being exploited?

CVE-2026-41680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41680 affect?

CVE-2026-41680 affects marked. Severity is high (CVSS 7.5). 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 unauthent

How urgent is CVE-2026-41680?

Priority 43/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

References

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