CVE catalog

CVE-2026-75589

Net::OAuth versions before 0.33 for Perl check…

[CVE catalog]

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.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.51% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "libnet-oauth-perl",
      "status": "fixed",
      "release": "sid",
      "version": "0.33-1"
    },
    {
      "name": "libnet-oauth-perl",
      "status": "fixed",
      "release": "forky",
      "version": "0.33-1"
    },
    {
      "name": "libnet-oauth-perl",
      "status": "vulnerable",
      "release": "trixie",
      "version": "0.31-1"
    },
    {
      "name": "libnet-oauth-perl",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "0.28-4"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1144855,
      "name": "libnet-oauth-perl",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "0.33-1"
    },
    {
      "bug": 1144855,
      "name": "libnet-oauth-perl",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "0.33-1"
    },
    {
      "bug": 1144855,
      "name": "libnet-oauth-perl",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1144855,
      "name": "libnet-oauth-perl",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

[Debian bug #1144855]

Publisher notes

[trixie] libnet-oauth-perl: Minor issue [bookworm] libnet-oauth-perl: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [libnet-oauth-perl]Unknown
    Details (2)

    • 0.28-4 · all · bookworm

      Affected

      nvd · libnet-oauth-perl · debian · bookworm; nvd · libnet-oauth-perl · debian · 12

    • 0.28-4 · all · bookworm

      Affected

      nvd · libnet-oauth-perl · debian · bookworm; nvd · libnet-oauth-perl · debian · 12

[Debian 13 (Trixie)]

  • [libnet-oauth-perl]Unknown
    Details (2)

    • 0.31-1 · all · trixie

      Affected

      nvd · libnet-oauth-perl · debian · 13

    • 0.31-1 · all · trixie

      Affected

      nvd · libnet-oauth-perl · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]