# CVE-2025-6492: MarkText index.js getRecommendTitleFromMarkdownString redos

> Remote attackers can cause denial of service in MarkText via inefficient regular expression complexity in title extraction.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jun 2025
- **Updated:** 23 Jun 2025
- **Also known as:** GHSA-295x-89h7-9wpm

## What is CVE-2025-6492?

CVE-2025-6492 is a medium-severity denial of service vulnerability in MarkText, published on 22 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in MarkText up to 0.17.1 and classified as problematic. Affected by this vulnerability is the function getRecommendTitleFromMarkdownString of the file marktext/src/main/utils/index.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-400 (Uncontrolled Resource Consumption), CWE-1333 (Inefficient Regular Expression Complexity)

## Which versions are affected by CVE-2025-6492?


## How do I fix CVE-2025-6492?

No fix has been published for CVE-2025-6492 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6492 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6492 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6492 and fix it if it is affected.

What it is: CVE-2025-6492 is a medium-severity denial of service vulnerability in MarkText, published on 22 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6492 exists.

Affected product: MarkText. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-6492/ (Markdown: https://insights.sbomify.com/CVE-2025-6492/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6492
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6492
- OSV: https://osv.dev/vulnerability/CVE-2025-6492

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-6492/
Summaries are generated and may contain mistakes; the official description above is the record.