Unrated

DEBIAN-CVE-2026-16615

Type: advisorySource: OSV1 source record

A flaw was found in librest. The PKCE implementation for OAuth authorization uses the GRand function from the GLib API, a cryptographically insecure pseudo-random number generator. Because the generated "code verifier" lacks sufficient cryptographic entropy, a malicious actor can reverse-engineer the pseudo-random number generator (PRNG) seed to predict or reconstruct the code verifier string, allowing an attacker to bypass PKCE protections and successfully impersonate the client during the OAuth 2.0 authorization flow.

Announced 22 Jul 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-16615

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-16615

librest

Source reference: /affected/0/package/name

Affected versions: 0.10.2-1
Source reference: /affected/0/versions
0.9.1-6
Source reference: /affected/0/versions
1.0.0-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

librest

Source reference: /affected/1/package/name

Affected versions: 0.10.2-1
Source reference: /affected/1/versions
0.9.1-6
Source reference: /affected/1/versions
1.0.0-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

librest

Source reference: /affected/2/package/name

Affected versions: 0.10.2-1
Source reference: /affected/2/versions
0.9.1-6
Source reference: /affected/2/versions
1.0.0-1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "librest",
      "purl": "pkg:deb/debian/librest?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.10.2-1",
      "0.9.1-6",
      "1.0.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16615.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "librest",
      "purl": "pkg:deb/debian/librest?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.10.2-1",
      "0.9.1-6",
      "1.0.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16615.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "librest",
      "purl": "pkg:deb/debian/librest?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.10.2-1",
      "0.9.1-6",
      "1.0.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-16615.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #56144 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 16:25:53 GMT
Publisher date: Wed, 22 Jul 2026 17:16:55 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-16615 · Revision 1Source updated