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DEBIAN-CVE-2026-9678

Type: advisorySource: OSV1 source record

Impact: Undici's cache interceptor incorrectly classifies some responses as cacheable when the upstream Cache-Control header uses whitespace-padded qualified private or no-cache field names such as private=" authorization" or no-cache="\tauthorization". The parser preserves the surrounding whitespace, so later comparisons against the literal authorization field name fail and the response is stored. In shared-cache mode, this allows a response containing one user's authenticated data to be served from cache to a subsequent caller, including an unauthenticated caller, when both requests resolve to the same cache key. Affected applications are those that explicitly enable the cache interceptor (interceptors.cache()) in shared mode, forward Authorization headers upstream, and receive cacheable responses with non-canonical qualified private or no-cache directives. Patches: Upgrade to undici v7.28.0 or v8.5.0. Workarounds: If upgrade is not immediately possible, disable shared-cache mode for traffic that includes Authorization headers, avoid caching responses to authenticated requests, or add Vary: Authorization upstream.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-9678

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-2026-9678

node-undici

Source reference: /affected/0/package/name

Affected versions
7.15.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.15.0+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

7.16.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.16.0+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

7.18.2+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.5+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

7.24.6+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

7.3.0+dfsg1+~cs24.12.11-1

Source reference: /affected/0/versions

7.3.0+dfsg1+~cs24.12.11-2

Source reference: /affected/0/versions

8.10.2+dfsg+~cs3.2.2-1

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-2

Source reference: /affected/0/versions

8.5.0+dfsg+~cs3.2.0-3

Source reference: /affected/0/versions

8.9.0+dfsg+~cs3.2.0-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

node-undici

Source reference: /affected/1/package/name

Affected versions
7.15.0+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.15.0+dfsg+~cs3.2.0-3

Source reference: /affected/1/versions

7.16.0+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.16.0+dfsg+~cs3.2.0-2

Source reference: /affected/1/versions

7.18.2+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.24.5+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.24.6+dfsg+~cs3.2.0-1

Source reference: /affected/1/versions

7.24.6+dfsg+~cs3.2.0-2

Source reference: /affected/1/versions

7.24.6+dfsg+~cs3.2.0-3

Source reference: /affected/1/versions

7.3.0+dfsg1+~cs24.12.11-1

Source reference: /affected/1/versions

7.3.0+dfsg1+~cs24.12.11-2

Source reference: /affected/1/versions

Fixed versions
8.5.0+dfsg+~cs3.2.0-1

Source reference: /affected/1/ranges

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": "node-undici",
      "purl": "pkg:deb/debian/node-undici?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "7.15.0+dfsg+~cs3.2.0-1",
      "7.15.0+dfsg+~cs3.2.0-3",
      "7.16.0+dfsg+~cs3.2.0-1",
      "7.16.0+dfsg+~cs3.2.0-2",
      "7.18.2+dfsg+~cs3.2.0-1",
      "7.24.5+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-2",
      "7.24.6+dfsg+~cs3.2.0-3",
      "7.3.0+dfsg1+~cs24.12.11-1",
      "7.3.0+dfsg1+~cs24.12.11-2",
      "8.10.2+dfsg+~cs3.2.2-1",
      "8.5.0+dfsg+~cs3.2.0-1",
      "8.5.0+dfsg+~cs3.2.0-2",
      "8.5.0+dfsg+~cs3.2.0-3",
      "8.9.0+dfsg+~cs3.2.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9678.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "8.5.0+dfsg+~cs3.2.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-undici",
      "purl": "pkg:deb/debian/node-undici?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "7.15.0+dfsg+~cs3.2.0-1",
      "7.15.0+dfsg+~cs3.2.0-3",
      "7.16.0+dfsg+~cs3.2.0-1",
      "7.16.0+dfsg+~cs3.2.0-2",
      "7.18.2+dfsg+~cs3.2.0-1",
      "7.24.5+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-1",
      "7.24.6+dfsg+~cs3.2.0-2",
      "7.24.6+dfsg+~cs3.2.0-3",
      "7.3.0+dfsg1+~cs24.12.11-1",
      "7.3.0+dfsg1+~cs24.12.11-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9678.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57013 · Revision 1
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Publisher date
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