Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Laravel Framework versions below 12.60.0, and versions from 13.0.0 up to but not including 13.10.0, are affected by a CRLF injection flaw in the default email validation rule. The flaw, combined with how Symfony Mailer and Symfony Mime handle certain character sequences, may let an unauthenticated attacker who can supply an email address influence outbound mail. Upgrade to 12.60.0 or 13.10.0, depending on your release line.
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 |
|---|---|---|---|---|
| 8.9 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0051, the 44th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 1 Jun 2026, 08:23 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 14:01 UTC First seen by agentprime
- 31 Oct 2026, 14:01 UTC Confirmed by OSV