CVE-2026-45068
highpriority · track · 30EPSS 0.005 · 44 %ileEUUSEPSS · scored 2026-10-27
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, SendmailTransport in -t mode appended recipient addresses to the sendmail command line without a -- end-of-options separator, allowing an address beginning with - to be interpreted as a sendmail command-line option instead of an address. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (20)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-xx3c-qf5g-hc39Symfony has an Argument Injection in SendmailTransport via Dash-Prefixed Recipient Address2026-05-27ghsa · osvUS
### Description Symfony Mailer selects a transport via the `MAILER_DSN` environment variable / configuration (e.g. `smtp://...`, `sendmail://...`, `native://default`). `SendmailTransport` invokes the local `sendmail` binary and supports two modes: `-bs` (speak SMTP over stdin: the default) and `-t` (read the message on stdin, pass recipients as command-line arguments). In `-t` mode, recipient addresses are appended to the sendmail command line **without a `--` end-of-options separator**. A recipient address beginning with `-` (which `Symfony\Component\Mime\Address` accepts as valid) is therefore interpreted by sendmail as a command-line option rather than an address. ### Resolution The `SendmailTransport` transport now ensure `--` is set before the list of recipients. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/c45144862dc289d03952f41f6078174089a3afc6) for branch 5.4. ### Credits Symfony would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.
also known as (3)
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sources
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references (19)
External citations — patches, advisories, analysis.
- https://github.com/symfony/symfony/commit/c45144862dc289d03952f41f6078174089a3afc6cnnvd
- https://github.com/symfony/symfony/releasesPatchcnnvd
- https://github.com/symfony/symfony/releases/tag/v5.4.52cnnvd
- https://github.com/symfony/symfony/releases/tag/v6.4.40cnnvd
- https://github.com/symfony/symfony/releases/tag/v7.4.12cnnvd
- https://github.com/symfony/symfony/releases/tag/v8.0.12cnnvd
- https://github.com/symfony/symfony/security/advisories/GHSA-xx3c-qf5g-hc39cnnvd
- https://github.com/symfony/symfony/commit/c45144862dc289d03952f41f6078174089a3afc6enisa_euvd
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