Unrated

DEBIAN-CVE-2026-77528

Type: advisorySource: OSV1 source record

Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted and asyncio. Prior to 26.7.1, WebSocket endpoints that accept permessage-deflate and rely on maxMessagePayloadSize enforce that limit against the compressed frame length before inflation but do not recheck the decompressed message size before delivery. A remote unauthenticated client can send a valid compressed frame below the configured wire-size limit that expands beyond the application message limit, causing oversized data to be allocated, joined, validated, and passed to application callbacks. This can create resource-exhaustion pressure, but the advisory does not establish confidentiality or integrity impact. This issue is fixed in version 26.7.1.

Announced 18 Sept 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-77528

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-2026-77528

python-autobahn

Source reference: /affected/0/package/name

Affected versions: 22.7.1+dfsg1-2
Source reference: /affected/0/versions
22.7.1+dfsg1-3
Source reference: /affected/0/versions
22.7.1+dfsg1-4
Source reference: /affected/0/versions
23.1.2+dfsg1-1
Source reference: /affected/0/versions
23.1.2+dfsg1-2
Source reference: /affected/0/versions
24.4.2+dfsg1-1
Source reference: /affected/0/versions
24.4.2+dfsg1-2
Source reference: /affected/0/versions
24.4.2+dfsg1-3
Source reference: /affected/0/versions
24.4.2+dfsg1-4
Source reference: /affected/0/versions
24.4.2+dfsg1-5
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

python-autobahn

Source reference: /affected/1/package/name

Affected versions: 23.1.2+dfsg1-2
Source reference: /affected/1/versions
24.4.2+dfsg1-1
Source reference: /affected/1/versions
24.4.2+dfsg1-2
Source reference: /affected/1/versions
24.4.2+dfsg1-3
Source reference: /affected/1/versions
24.4.2+dfsg1-4
Source reference: /affected/1/versions
24.4.2+dfsg1-5
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

python-autobahn

Source reference: /affected/2/package/name

Affected versions: 23.1.2+dfsg1-2
Source reference: /affected/2/versions
24.4.2+dfsg1-1
Source reference: /affected/2/versions
24.4.2+dfsg1-2
Source reference: /affected/2/versions
24.4.2+dfsg1-3
Source reference: /affected/2/versions
24.4.2+dfsg1-4
Source reference: /affected/2/versions
24.4.2+dfsg1-5
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": "python-autobahn",
      "purl": "pkg:deb/debian/python-autobahn?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "22.7.1+dfsg1-2",
      "22.7.1+dfsg1-3",
      "22.7.1+dfsg1-4",
      "23.1.2+dfsg1-1",
      "23.1.2+dfsg1-2",
      "24.4.2+dfsg1-1",
      "24.4.2+dfsg1-2",
      "24.4.2+dfsg1-3",
      "24.4.2+dfsg1-4",
      "24.4.2+dfsg1-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77528.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python-autobahn",
      "purl": "pkg:deb/debian/python-autobahn?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "23.1.2+dfsg1-2",
      "24.4.2+dfsg1-1",
      "24.4.2+dfsg1-2",
      "24.4.2+dfsg1-3",
      "24.4.2+dfsg1-4",
      "24.4.2+dfsg1-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77528.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python-autobahn",
      "purl": "pkg:deb/debian/python-autobahn?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "23.1.2+dfsg1-2",
      "24.4.2+dfsg1-1",
      "24.4.2+dfsg1-2",
      "24.4.2+dfsg1-3",
      "24.4.2+dfsg1-4",
      "24.4.2+dfsg1-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77528.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #15047 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 00:52:12 GMT
Publisher date: Fri, 18 Sep 2026 20:17:22 GMT

Read the original announcement