CVE-2026-75589

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-75589
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75589.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-75589
Aliases
  • GHSA-g8xr-69p3-gw56
Downstream
Related
Published
2026-08-19T07:20:44Z
Modified
2026-08-31T03:45:12Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify
Details

Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify.

Each of the three compares the signature carried in the message against the locally computed one with the eq operator, which returns as soon as the two strings differ. The time taken to reject a signature varies with the length of the matching prefix. RSA-SHA1 is not affected, as it verifies through the RSA key object rather than by comparing strings.

A client that can submit messages and time the replies may recover a valid signature one byte at a time rather than searching the whole signature space. Under PLAINTEXT the value compared against is the signature key itself, so the search recovers consumer_secret and token_secret.

Database specific 
{
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-208"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75589.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
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.33"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "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-2026-75589.json"