# Possible DoS by memory exhaustion in net-imap

Advisory record · `GHSA-7fc5-f82f-cx69`

- **Identifiers:** `GHSA-7fc5-f82f-cx69` · `CVE-2025-25186`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-400](https://cwe.mitre.org/data/definitions/400.html) · [CWE-405](https://cwe.mitre.org/data/definitions/405.html) · [CWE-409](https://cwe.mitre.org/data/definitions/409.html) · [CWE-770](https://cwe.mitre.org/data/definitions/770.html) · [CWE-789](https://cwe.mitre.org/data/definitions/789.html) · [CWE-1287](https://cwe.mitre.org/data/definitions/1287.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) · [CWE-405](https://agentprime.io/advisories/tag/cwe-405.md) · [CWE-409](https://agentprime.io/advisories/tag/cwe-409.md) · [CWE-1287](https://agentprime.io/advisories/tag/cwe-1287.md)
- **Published:** 10 Feb 2025
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Feb 2025, 17:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `net-imap` (RubyGems): affected `>=0.3.2, <0.3.8 || >=0.4.0, <0.4.19 || >=0.5.0, <0.5.6`; fixed in `0.3.8`, `0.4.19`, `0.5.6`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0063, the 50th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:16 UTC: First seen by agentprime
- 31 Oct 2026, 15:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7fc5-f82f-cx69)

## Sources

- [GitHub Advisory Database: GHSA-7fc5-f82f-cx69](https://github.com/advisories/GHSA-7fc5-f82f-cx69)
- [OSV: GHSA-7fc5-f82f-cx69](https://osv.dev/vulnerability/GHSA-7fc5-f82f-cx69)
- <https://github.com/ruby/net-imap/security/advisories/GHSA-7fc5-f82f-cx69>
- <https://nvd.nist.gov/vuln/detail/CVE-2025-25186>
- <https://github.com/ruby/net-imap/commit/70e3ddd071a94e450b3238570af482c296380b35>
- <https://github.com/ruby/net-imap/commit/c8c5a643739d2669f0c9a6bb9770d0c045fd74a3>
- <https://github.com/ruby/net-imap/commit/cb92191b1ddce2d978d01b56a0883b6ecf0b1022>
- <https://github.com/ruby/net-imap>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2025-25186.yml>
- <https://ruby.github.io/net-imap/Net/IMAP/AppendUIDData.html>
- <https://ruby.github.io/net-imap/Net/IMAP/CopyUIDData.html>
- <https://ruby.github.io/net-imap/Net/IMAP/UIDPlusData.html>

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-7fc5-f82f-cx69>, 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-7fc5-f82f-cx69/>. Everything for agents: <https://agentprime.io/llms.txt>.