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CVE-2021-26813

HIGHCVSS 7.5/10EPSS 2.38%

Last modified

CVE-2021-26813 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.. EPSS estimates a 2.38% chance of exploitation in the next 30 days.

Description

markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
2.38%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Markdown2 ProjectMarkdown2>= 1.0.1.18, < 2.4.0
FedoraprojectFedora32
FedoraprojectFedora33
FedoraprojectFedora34

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26813?
markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.
How severe is CVE-2021-26813?
CVE-2021-26813 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.38% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26813?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26813?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST