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CVE-2026-28755

CVE-2026-28755 · NGINX ngx_stream_ssl_module vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_stream_ssl_module module due to the improper handling of revoked certificates when configured with the ssl_verify_client on and ssl_ocsp on directives, allowing the TLS handshake to succeed even after an OCSP check identifies the certificate as revoked.   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 5.3 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system · web

Affected products and versions

  • nginx

    Versions
    • ≥ 1.29.0, < 1.29.7: Affected (semver)
    • ≥ 1.27.2, < 1.28.3: Affected (semver)

    Update to 1.28.3; Update to 1.29.7

  • nginx plus

    Versions
    • ≥ R36, < R36 P3: Affected (custom)
    • ≥ R35, < R35 P2: Affected (custom)
    • ≥ R34: Affected (custom)
    • ≥ R33: Affected (custom)

    No fix published

  • nginx 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
    Affected ranges
    • ECOSYSTEM: < 1.28.3-2

    Update to 1.28.3-2

  • nginx Ubuntu:24.04:LTS

    Versions
    • 1.24.0-1ubuntu1
    • 1.24.0-2ubuntu1
    • 1.24.0-2ubuntu2
    • 1.24.0-2ubuntu3
    • 1.24.0-2ubuntu4
    • 1.24.0-2ubuntu6
    • 1.24.0-2ubuntu7
    • 1.24.0-2ubuntu7.1
    • 1.24.0-2ubuntu7.3
    • 1.24.0-2ubuntu7.4
    • 1.24.0-2ubuntu7.5
    • 1.24.0-2ubuntu7.6
    Affected ranges
    • ECOSYSTEM: < 1.24.0-2ubuntu7.7

    Update to 1.24.0-2ubuntu7.7

  • nginx Ubuntu:25.10

    Versions
    • 1.26.3-2ubuntu1
    • 1.26.3-3ubuntu1
    • 1.26.3-3ubuntu2
    • 1.26.3-3ubuntu3
    • 1.28.0-3ubuntu1
    • 1.28.0-4ubuntu1
    • 1.28.0-6ubuntu1
    • 1.28.0-6ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 1.28.0-6ubuntu1.2

    Update to 1.28.0-6ubuntu1.2

Original sources

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