CVE-2022-31043Network attack vector

Authorization-header disclosure via HTTPS downgrade redirects

Published Jun 9, 2022 · Updated Apr 23, 2025

Sensitive-information exposure in Guzzle before 6.5.7 and 7.0.0 through 7.4.3 allows attackers to read Authorization headers. RedirectMiddleware.modifyRequest stripped Authorization only when the destination host changed, so a same-host HTTPS-to-HTTP redirect retained the header. Exploitation requires an application to send an Authorization header and follow a server-controlled downgrade redirect, exposing the credential to the HTTP destination and network observers.

CVSS severity7.5
High
EPSS probability1.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Sensitive-information exposure in Guzzle before 6.5.7 and 7.0.0 through 7.4.3 allows attackers to read Authorization headers. RedirectMiddleware.modifyRequest stripped Authorization only when the destination host changed, so a same-host HTTPS-to-HTTP redirect retained the header. Exploitation requires an application to send an Authorization header and follow a server-controlled downgrade redirect, exposing the credential to the HTTP destination and network observers.

The record

CVE
CVE-2022-31043
Published
Jun 9, 2022
Updated
Apr 23, 2025
Vendor
Guzzle
Product
Guzzle
Classifications
CWE-200, CWE-212
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.5.7
  2. Affected versionversion=>=7.0.0, < 7.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Guzzle · Guzzleversion=< 6.5.7; version=>=7.0.0, < 7.4.4

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-212Improper Removal of Sensitive Information Before Storage or Transfer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo