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CVE-2026-87776

CVE-2026-87776 · compression vulnerable to Denial of Service via memory leak on premature response close

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

compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the available memory and crashing the server. All applications using compression are affected. The issue is fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later.

CVSS 7.5 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • compression

    Versions
    • ≥ 0, < 1.8.2: Affected (semver)
    • 1.8.2: Not affected (semver)

    Update to 1.8.2

  • node-compression Debian:12

    Versions
    • 1.7.4-3
    • 1.8.1-1
    • 1.8.2+~1.8.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Debian:13

    Versions
    • 1.7.4-3
    • 1.8.1-1
    • 1.8.2+~1.8.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Debian:14

    Versions
    • 1.7.4-3
    • 1.8.1-1
    Affected ranges
    • ECOSYSTEM: < 1.8.2+~1.8.1-1

    Update to 1.8.2+~1.8.1-1

  • compression npm

    Affected ranges
    • SEMVER: < 1.8.2

    Update to 1.8.2

  • node-compression Ubuntu:16.04:LTS

    Versions
    • 1.1.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:18.04:LTS

    Versions
    • 1.1.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:20.04:LTS

    Versions
    • 1.7.4-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:22.04:LTS

    Versions
    • 1.7.4-2
    • 1.7.4-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:24.04:LTS

    Versions
    • 1.7.4-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:26.10

    Versions
    • 1.7.4-3
    • 1.8.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-compression Ubuntu:26.04:LTS

    Versions
    • 1.7.4-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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