How severe is CVE-2023-28626?

CVE-2023-28626 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-2023-28626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28626?

CVE-2023-28626 affects Comrak Project Comrak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28626?

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

When was CVE-2023-28626 published?

CVE-2023-28626 was published on 2023-03-28 and last updated on 2026-06-17.

CVE-2023-28626

CVE-2023-28626 is a medium-severity vulnerability in Comrak Project Comrak 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Comrak Project Comrak
Published: 2023-03-28
Last modified: 2026-06-17

Description

comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A range of quadratic parsing issues are present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. This issue has been addressed in version 0.17.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as `GHSL-2023-047`

Frequently asked questions

What is CVE-2023-28626?: comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A range of quadratic parsing issues are present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. This issue has been addressed in version 0.17.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as `GHSL-2023-047`
How severe is CVE-2023-28626?: CVE-2023-28626 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-2023-28626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28626?: CVE-2023-28626 affects Comrak Project Comrak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28626?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-28626 published?: CVE-2023-28626 was published on 2023-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:comrak_project:comrak:*:*:*:*:*:rust:*:*

More vulnerabilities in Comrak Project Comrak

CVE-2021-38186 — Medium (CVSS 6.1): An issue was discovered in the comrak crate before 0.10.1 for Rust. It mishandles & characters, leading to XSS via &#…
CVE-2021-27671 — Medium (CVSS 6.1): An issue was discovered in the comrak crate before 0.9.1 for Rust. XSS can occur because the protection mechanism for…
CVE-2023-28631 — Medium (CVSS 5.3): comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A Comrak AST can be constructed…

All CVEs affecting Comrak Project Comrak →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →