# Roundcube Webmail: Bypass of remote image blocking via SVG content (with animate attributes) in an e-mail message

Advisory record · `GHSA-j2g6-8rvg-7mf6`

- **Identifiers:** `GHSA-j2g6-8rvg-7mf6` · `CVE-2026-35543` · `PKSA-qdpg-77hy-3x5t`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-669](https://cwe.mitre.org/data/definitions/669.html)
- **Tags:** [CWE-669](https://agentprime.io/advisories/tag/cwe-669.md)
- **Published:** 3 Apr 2026
- **Updated:** 4 Apr 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 3 Apr 2026, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `roundcube/roundcubemail` (Packagist): affected `>=1.7-beta, <1.7-rc5`; fixed in `1.7-rc5`

## 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

- 5.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`, from CNA (mitre)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0042, the 36th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:25 UTC: First seen by agentprime
- 31 Oct 2026, 14:25 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-j2g6-8rvg-7mf6)

## Sources

- [GitHub Advisory Database: GHSA-j2g6-8rvg-7mf6](https://github.com/advisories/GHSA-j2g6-8rvg-7mf6)
- [OSV: GHSA-j2g6-8rvg-7mf6](https://osv.dev/vulnerability/GHSA-j2g6-8rvg-7mf6)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-35543>
- <https://github.com/roundcube/roundcubemail/commit/1a63e01542bff42aaa71c00c4c279a09ef31f20c>
- <https://github.com/roundcube/roundcubemail/commit/39471343ee081ce1d31696c456a2c163462daae3>
- <https://github.com/roundcube/roundcubemail/commit/82ab5eca7b332fce7a174b2b987f0957a66377cd>
- <https://github.com/roundcube/roundcubemail>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.5.14>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.6.14>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5>
- <https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14>

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-j2g6-8rvg-7mf6>, 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-j2g6-8rvg-7mf6/>. Everything for agents: <https://agentprime.io/llms.txt>.