GHSA-vc2v-76pw-4v95

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    GHSA-vc2v-76pw-4v95

    Published: 5 Oct 2026Last Modified: 5 Oct 2026

    Summary: compression vulnerable to Denial of Service via memory leak on premature response close

    Details: ### Impact A vulnerability in compression `< 1.8.2` allows an attacker to trigger a Denial of Service (DoS) by disconnecting while a compressed response is being sent. When the client aborts the connection before the response finishes, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. Repeated aborted requests can exhaust available memory. All applications using compression are affected. ### Patches Users should upgrade to `1.8.2`. ### Workarounds None.

    References: https://github.com/expressjs/compression/security/advisories/GHSA-vc2v-76pw-4v95, https://nvd.nist.gov/vuln/detail/CVE-2026-87776, https://github.com/expressjs/compression/commit/151f63e91e1b64f8fb0b064e19321a4f28db6bff, https://cna.openjsf.org/security-advisories.html, https://github.com/expressjs/compression, https://github.com/expressjs/compression/releases/tag/v1.8.2

    Affected packages

    Package

    Name: compression

    Purl: pkg:npm/compression

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.8.2

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-vc2v-76pw-4v95 | CVE-DB