# Mail Gem CRLF Injection vulnerability

Advisory record · `GHSA-q86f-fmqf-qrf6`

- **Identifiers:** `GHSA-q86f-fmqf-qrf6` · `CVE-2015-9097`
- **State:** Confirmed
- **Severity:** CVSS 6.1 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-93](https://cwe.mitre.org/data/definitions/93.html)
- **Tags:** [Other injection](https://agentprime.io/advisories/tag/injection.md)
- **Published:** 24 Oct 2017
- **Updated:** 16 Feb 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 Oct 2017, 18:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `mail` (RubyGems): affected `<2.5.5`; fixed in `2.5.5`

## 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

- 6.1 Medium, CVSS 3.0: `CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.034, the 88th percentile, on 11 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 24 Oct 2017. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-q86f-fmqf-qrf6](https://github.com/advisories/GHSA-q86f-fmqf-qrf6)
- [OSV: GHSA-q86f-fmqf-qrf6](https://osv.dev/vulnerability/GHSA-q86f-fmqf-qrf6)
- <https://nvd.nist.gov/vuln/detail/CVE-2015-9097>
- <https://github.com/rubysec/ruby-advisory-db/issues/215>
- <https://github.com/mikel/mail/pull/1097>
- <https://github.com/mikel/mail/commit/72befdc4dab3e6e288ce226a7da2aa474cf5be83>
- <https://hackerone.com/reports/137631>
- <https://github.com/advisories/GHSA-q86f-fmqf-qrf6>
- <https://github.com/mikel/mail>
- <https://rubysec.com/advisories/mail-OSVDB-131677>
- <http://openwall.com/lists/oss-security/2015/12/11/3>
- <http://www.mbsd.jp/Whitepaper/smtpi.pdf>

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-q86f-fmqf-qrf6>, 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-q86f-fmqf-qrf6/>. Everything for agents: <https://agentprime.io/llms.txt>.