# CarrierWave has a denylisted_content_type bypass via Unescaped Regex Metacharacters

Advisory record · `GHSA-7g26-2qgj-chfg`

- **Identifiers:** `GHSA-7g26-2qgj-chfg` · `CVE-2026-44587`
- **State:** Confirmed
- **Severity:** CVSS 4.7 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html) · [CWE-116](https://cwe.mitre.org/data/definitions/116.html) · [CWE-184](https://cwe.mitre.org/data/definitions/184.html) · [CWE-625](https://cwe.mitre.org/data/definitions/625.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) · [CWE-116](https://agentprime.io/advisories/tag/cwe-116.md) · [CWE-184](https://agentprime.io/advisories/tag/cwe-184.md) · [CWE-625](https://agentprime.io/advisories/tag/cwe-625.md)
- **Published:** 27 May 2026
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 May 2026, 00:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `carrierwave` (RubyGems): affected `>=3.0.0.beta, <3.1.3 || <2.2.7`; fixed in `3.1.3`, `2.2.7`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 4.7 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 13th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 27 May 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-7g26-2qgj-chfg](https://github.com/advisories/GHSA-7g26-2qgj-chfg)
- [OSV: GHSA-7g26-2qgj-chfg](https://osv.dev/vulnerability/GHSA-7g26-2qgj-chfg)
- <https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-7g26-2qgj-chfg>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-44587>
- <https://github.com/carrierwaveuploader/carrierwave/commit/21221cc6e260633f7da78c6133a88666a5529d27>
- <https://github.com/carrierwaveuploader/carrierwave/commit/4c4a005775a436c5165df014dc9b1874c227d86c>
- <https://github.com/carrierwaveuploader/carrierwave>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/carrierwave/CVE-2026-44587.yml>
- <https://www.cve.org/CVERecord?id=CVE-2026-44587>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7g26-2qgj-chfg>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-7g26-2qgj-chfg/>. Everything for agents: <https://agentprime.io/llms.txt>.