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DEBIAN-CVE-2026-42934

Type: advisorySource: OSV1 source record

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-42934

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-2026-42934

nginx

Source reference: /affected/0/package/name

Affected versions
1.22.1-9

Source reference: /affected/0/versions

1.22.1-9+deb12u1

Source reference: /affected/0/versions

1.22.1-9+deb12u2

Source reference: /affected/0/versions

1.22.1-9+deb12u3

Source reference: /affected/0/versions

1.22.1-9+deb12u4

Source reference: /affected/0/versions

1.22.1-9+deb12u5

Source reference: /affected/0/versions

1.22.1-9+deb12u6

Source reference: /affected/0/versions

Fixed versions
1.22.1-9+deb12u7

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

nginx

Source reference: /affected/1/package/name

Affected versions
1.26.3-3

Source reference: /affected/1/versions

1.26.3-3+deb13u1

Source reference: /affected/1/versions

1.26.3-3+deb13u2

Source reference: /affected/1/versions

1.26.3-3+deb13u3

Source reference: /affected/1/versions

1.26.3-3+deb13u4

Source reference: /affected/1/versions

Fixed versions
1.26.3-3+deb13u5

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

nginx

Source reference: /affected/2/package/name

Affected versions
1.26.3-3

Source reference: /affected/2/versions

1.28.0-1

Source reference: /affected/2/versions

1.28.0-2

Source reference: /affected/2/versions

1.28.0-3

Source reference: /affected/2/versions

1.28.0-4

Source reference: /affected/2/versions

1.28.0-5

Source reference: /affected/2/versions

1.28.0-6

Source reference: /affected/2/versions

1.28.1-1

Source reference: /affected/2/versions

1.28.1-2

Source reference: /affected/2/versions

1.28.1-3

Source reference: /affected/2/versions

1.28.2-1

Source reference: /affected/2/versions

1.28.2-2

Source reference: /affected/2/versions

1.28.2-3

Source reference: /affected/2/versions

1.28.2-4

Source reference: /affected/2/versions

1.28.3-1

Source reference: /affected/2/versions

1.28.3-2

Source reference: /affected/2/versions

1.30.0-1

Source reference: /affected/2/versions

1.30.0-2

Source reference: /affected/2/versions

1.30.0-3

Source reference: /affected/2/versions

Fixed versions
1.30.0-4

Source reference: /affected/2/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"
          },
          {
            "fixed": "1.22.1-9+deb12u7"
          }
        ]
      }
    ],
    "package": {
      "name": "nginx",
      "purl": "pkg:deb/debian/nginx?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.22.1-9",
      "1.22.1-9+deb12u1",
      "1.22.1-9+deb12u2",
      "1.22.1-9+deb12u3",
      "1.22.1-9+deb12u4",
      "1.22.1-9+deb12u5",
      "1.22.1-9+deb12u6"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42934.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.26.3-3+deb13u5"
          }
        ]
      }
    ],
    "package": {
      "name": "nginx",
      "purl": "pkg:deb/debian/nginx?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.26.3-3",
      "1.26.3-3+deb13u1",
      "1.26.3-3+deb13u2",
      "1.26.3-3+deb13u3",
      "1.26.3-3+deb13u4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42934.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.30.0-4"
          }
        ]
      }
    ],
    "package": {
      "name": "nginx",
      "purl": "pkg:deb/debian/nginx?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.26.3-3",
      "1.28.0-1",
      "1.28.0-2",
      "1.28.0-3",
      "1.28.0-4",
      "1.28.0-5",
      "1.28.0-6",
      "1.28.1-1",
      "1.28.1-2",
      "1.28.1-3",
      "1.28.2-1",
      "1.28.2-2",
      "1.28.2-3",
      "1.28.2-4",
      "1.28.3-1",
      "1.28.3-2",
      "1.30.0-1",
      "1.30.0-2",
      "1.30.0-3"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42934.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56980 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-42934 · Revision 1Source updated