GHSA-qfvm-cv95-jqjf

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    GHSA-qfvm-cv95-jqjf

    Published: 8 Sept 2026Last Modified: 8 Sept 2026

    Summary: multer vulnerable to Denial of Service via file descriptor leak on aborted uploads

    Details: ### Impact A vulnerability in multer `2.2.0` allows an attacker to trigger a Denial of Service (DoS) by aborting or truncating multipart uploads. When using `diskStorage`, the destination write stream is not closed if the upload is aborted before it finishes, so each failed request leaks an open file descriptor and retains its disk blocks until the process exits. Repeated failed uploads can exhaust the available file descriptors. All applications using multer's disk storage are affected. ### Patches Users should upgrade to `2.3.0`. ### Workarounds None.

    References: https://github.com/expressjs/multer/security/advisories/GHSA-qfvm-cv95-jqjf, https://nvd.nist.gov/vuln/detail/CVE-2026-77037, https://github.com/expressjs/multer/commit/eef74440b491ef0f976f3d25895e8089ae495df0, https://cna.openjsf.org/security-advisories.html, https://github.com/expressjs/multer, https://github.com/expressjs/multer/releases/tag/v2.3.0

    Affected packages

    Package

    Name: multer

    Purl: pkg:npm/multer

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 2.2.0
    Fixed -2.3.0

    Affected versions

    2.2.0

    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