CVE-2022-27774Public exploitNetwork attack vector

Credential disclosure via flawed redirect host check

Published Jun 1, 2022 · Updated May 27, 2026

Insufficient credential protection in curl 4.9 through 7.82.0 allows remote attackers to read credentials through authenticated redirects. The redirect same-host check ignores protocol changes and port differences, so curl forwards user passwords or TLS-SRP credentials to another service. Exposure requires automatic redirect following, supplied credentials, and an attacker-controlled redirect or destination; default redirects are limited to HTTP(S) and FTP(S).

CVSS severity5.7
Medium
EPSS probability1.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient credential protection in curl 4.9 through 7.82.0 allows remote attackers to read credentials through authenticated redirects. The redirect same-host check ignores protocol changes and port differences, so curl forwards user passwords or TLS-SRP credentials to another service. Exposure requires automatic redirect following, supplied credentials, and an attacker-controlled redirect or destination; default redirects are limited to HTTP(S) and FTP(S).

The record

CVE
CVE-2022-27774
Published
Jun 1, 2022
Updated
May 27, 2026
Vendor
curl
Product
curl
Classifications
CWE-522
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=curl 4.9 to and include curl 7.82.0 are affected

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

curl · curlversion=curl 4.9 to and include curl 7.82.0 are affected

Published CVSS scores

5.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:P/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials

Public exploit references

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

Technologies

Your stack

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Your stack

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