CVE-2026-72889

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-72889
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72889.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-72889
Aliases
  • GHSA-c8rm-g5cm-4pf5
Downstream
Related
Published
2026-08-19T07:20:09Z
Modified
2026-08-31T03:45:11Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify
Details

Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify.

verify resolves the signature method class from the signature_method parameter of the incoming message. signature_method is required on every request, so the algorithm used to check a signature is chosen by whoever sent it, and nothing lets the verifying party pin the method instead. When a message names HMAC-SHA1 or HMAC-SHA256, the key is derived from consumer_secret and token_secret rather than from the key the provider deployed.

A provider deployed on RSA-SHA1 holds only the consumer public key, and RFC 5849 does not use consumer_secret for that method, so the required parameter is filled with a placeholder. A client that names HMAC-SHA1 instead has its signature checked against that placeholder, so a guessable one is enough to forge requests for any consumer key and token.

Database specific 
{
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-347",
        "CWE-757"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72889.json"
}
References

Affected packages

Git / github.com/vurtdev/net-oauth

Affected ranges

Type
GIT
Repo
https://github.com/vurtdev/net-oauth
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a1a16b58add85668ef4fcda642a486ceed098eba
Fixed
c467adf45c8d77ac4b92ad78b3eebf949252ba7f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.33"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.29
v0.30
v0.31
v0.32

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72889.json"