CVE-2022-31091: Guzzle, an extensible PHP HTTP client. `Authorization` and `Cookie` headers on requests are sensitive information. In affected versions on making a re...

Description

Guzzle, an extensible PHP HTTP client. `Authorization` and `Cookie` headers on requests are sensitive information. In affected versions on making a request which responds with a redirect to a URI with a different port, if we choose to follow it, we should remove the `Authorization` and `Cookie` headers from the request, before containing. Previously, we would only consider a change in host or scheme. Affected Guzzle 7 users should upgrade to Guzzle 7.4.5 as soon as possible. Affected users using any earlier series of Guzzle should upgrade to Guzzle 6.5.8 or 7.4.5. Note that a partial fix was implemented in Guzzle 7.4.2, where a change in host would trigger removal of the curl-added Authorization header, however this earlier fix did not cover change in scheme or change in port. An alternative approach would be to use your own redirect middleware, rather than ours, if you are unable to upgrade. If you do not require or expect redirects to be followed, one should simply disable redirects all together.

Metrics

CVSS 3.1

7.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS Probability

1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Guzzlephp	Guzzle	< 6.5.8
Guzzlephp	Guzzle	>= 7.0.0, < 7.4.5
Debian	Debian Linux	11.0

References

https://github.com/guzzle/guzzle/commit/1dd98b0564cb3f6bd16ce683cb755f94c10fbd82Patch, Third Party Advisory
https://github.com/guzzle/guzzle/security/advisories/GHSA-q559-8m2m-g699Mitigation, Third Party Advisory
https://security.gentoo.org/glsa/202305-24
https://www.debian.org/security/2022/dsa-5246Third Party Advisory
https://github.com/guzzle/guzzle/commit/1dd98b0564cb3f6bd16ce683cb755f94c10fbd82Patch, Third Party Advisory
https://github.com/guzzle/guzzle/security/advisories/GHSA-q559-8m2m-g699Mitigation, Third Party Advisory
https://security.gentoo.org/glsa/202305-24
https://www.debian.org/security/2022/dsa-5246Third Party Advisory

Timeline

Published: Jun 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-31091?

Guzzle, an extensible PHP HTTP client. `Authorization` and `Cookie` headers on requests are sensitive information. In affected versions on making a request which responds with a redirect to a URI with a different port, if we choose to follow it, we should remove the `Authorization` and `Cookie` headers from the request, before containing. Previously, we would only consider a change in host or scheme. Affected Guzzle 7 users should upgrade to Guzzle 7.4.5 as soon as possible. Affected users using any earlier series of Guzzle should upgrade to Guzzle 6.5.8 or 7.4.5. Note that a partial fix was implemented in Guzzle 7.4.2, where a change in host would trigger removal of the curl-added Authorization header, however this earlier fix did not cover change in scheme or change in port. An alternative approach would be to use your own redirect middleware, rather than ours, if you are unable to upgrade. If you do not require or expect redirects to be followed, one should simply disable redirects all together.

How severe is CVE-2022-31091?

CVE-2022-31091 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2022-31091?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.