GHSA-j99g-qjvx-995g: contao/contao (CVE-2019-10643)

Package	Ecosystem	Affected	Fixed in
contao/contao	Packagist	>=4.7.0, <4.7.3	4.7.3
contao/core-bundle	Packagist	>=4.7.0, <4.7.3	4.7.3

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Contao (contao/contao and contao/core-bundle) versions 4.7.0 through 4.7.2 are affected. Confirming an opt-in token does not invalidate previously issued opt-in tokens. The source gives few details about how an attacker would use this or what they could gain. Upgrade to version 4.7.3, which is listed as the fixed version.

Written 4 Nov 2026.

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

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS 0.013, the 69th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:29 UTC First seen by agentprime
31 Oct 2026, 14:29 UTC Confirmed by OSV

Sources

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.