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.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-370bd8b5f0 advisory.

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

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-e33554bf9f advisory.

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

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 46 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-96404091a4 advisory.

    Automatic update for perl-Net-OAuth-0.33-1.fc46.

    ##### **Changelog**

    ```
    * Thu Aug 27 2026 Xavier Bachelot <xacier@bachelot.org> -  0.33-1
    - Update to 0.32 (RHBZ#2517683)
      - Fixes CVE-2026-72889 (RHBZ#2519409)

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-75589)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
343787	Fedora 43 : perl-Net-OAuth (2026-370bd8b5f0)	Nessus	Fedora Local Security Checks	Local	high
343786	Fedora 44 : perl-Net-OAuth (2026-e33554bf9f)	Nessus	Fedora Local Security Checks	Local	high
341073	Fedora 46 : perl-Net-OAuth (2026-96404091a4)	Nessus	Fedora Local Security Checks	Local	critical
338039	Linux Distros Unpatched Vulnerability : CVE-2026-75589	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-75589

high

Tenable Plugins

high

high

critical

high