# Unrestricted activation email resending (see GHSA-mfxh-vp55-7gc6)

Advisory record · `PKSA-dtqn-wjcr-pw7c`

- **Identifiers:** `PKSA-dtqn-wjcr-pw7c` · `CVE-2026-107843`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-204](https://cwe.mitre.org/data/definitions/204.html) · [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) · [CWE-204](https://agentprime.io/advisories/tag/cwe-204.md)
- **Published:** 25 Aug 2026
- **Updated:** 25 Aug 2026
- **Reviewed by a person:** No

Published by Packagist at 25 Aug 2026, 06:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `contao/contao` (Packagist): affected `>=4.1.0, <5.3.50 || >=5.4.0, <5.7.12`; fixed in `5.3.50`, `5.7.12`

## 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 (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0027, the 19th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 25 Aug 2026, 06:40 UTC: [Confirmed by Packagist](https://contao.org/en/security-advisories/unrestricted-activation-email-resending)

## Sources

- [OSV: PKSA-dtqn-wjcr-pw7c](https://osv.dev/vulnerability/PKSA-dtqn-wjcr-pw7c)
- <https://contao.org/en/security-advisories/unrestricted-activation-email-resending>

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/PKSA-dtqn-wjcr-pw7c>, 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/PKSA-dtqn-wjcr-pw7c/>. Everything for agents: <https://agentprime.io/llms.txt>.