guzzlehttp/psr7 is a PSR-7 HTTP message library. Versions prior to 1.8.4 and 2.1.1 are vulnerable to improper header parsing. An attacker could sneak in a new line character and pass untrusted values. The issue is patched in 1.8.4 and 2.1.1. There are currently no known workarounds.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| guzzlehttp/psr7(Packagist) | 0 | 1.8.4 | N/A |
| guzzlehttp/psr7(Packagist) | 2.0.0 | 2.1.1 | N/A |
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