CVE-2022-31043 | Fix failure to strip Authorization header on HTTP downgrade in Guzzle

Guzzle is an open source PHP HTTP client. In affected versions `Authorization` headers on requests are sensitive information. On making a request using the `https` scheme to a server which responds with a redirect to a URI with the `http` scheme, we should not forward the `Authorization` header on. This is much the same as to how we don't forward on the header if the host changes. Prior to this fix, `https` to `http` downgrades did not result in the `Authorization` header being removed, only changes to the host. Affected Guzzle 7 users should upgrade to Guzzle 7.4.4 as soon as possible. Affected users using any earlier series of Guzzle should upgrade to Guzzle 6.5.7 or 7.4.4. Users unable to upgrade may consider an alternative approach which would be to use their own redirect middleware. Alternately users may simply disable redirects all together if redirects are not expected or required.

Published: 2022-06-09 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-31043 is rated Moderate Risk (56.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.81%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-31043

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.45% 1.81% +0.35%
2 2026-03-04 0.69% 1.45% +0.76%
3 2026-03-01 — 0.69% —

Full EPSS history (50 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-31043

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2022-31043

GitHub Security Advisory for CVE-2022-31043

GHSA-w248-ffj2-4v5q · Severity: high · Ecosystem: composer — Fix failure to strip Authorization header on HTTP downgrade

OS Trackers for CVE-2022-31043

vendor priority summary link
debian not yet assigned CVE-2022-31043 not yet assigned priority: Debian including 2 source packages (guzzle, mediawiki), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9. https://security-tracker.debian.org/tracker/CVE-2022-31043
ubuntu low CVE-2022-31043 low priority: Ubuntu including 1 source packages (guzzle), 8 status rows across 8 suites (kinetic, lunar, mantic, noble, oracular, plucky, questing, upstream): ignored 5, needs-triage 3. https://ubuntu.com/security/CVE-2022-31043

Affected software / configurations for CVE-2022-31043

Vendor Product Version Raw CPE
guzzlephp guzzle < 6.5.7 cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:*
guzzlephp guzzle >= 7.0.0, < 7.4.4 cpe:2.3:a:guzzlephp:guzzle:*:*:*:*:*:*:*:*
drupal drupal >= 9.2.0, < 9.2.21 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 9.3.0, < 9.3.16 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal 9.4.0 cpe:2.3:a:drupal:drupal:9.4.0:alpha1:*:*:*:*:*:*
drupal drupal 9.4.0 cpe:2.3:a:drupal:drupal:9.4.0:beta1:*:*:*:*:*:*
drupal drupal 9.4.0 cpe:2.3:a:drupal:drupal:9.4.0:rc1:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2022-31043

cvelogic Threat Intelligence