CVE-2026-82520

    Dashboard / Vulnerabilities / CVE-2026-82520

    CVE-2026-82520

    Published: 3 Sept 2026Last Modified: 26 Sept 2026

    Summary: parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments

    Details: parsedmarc before 11.0.1 decompresses gzip and ZIP attachments in a single unbounded read with no limit on decompressed output size. Because parsedmarc automatically processes incoming DMARC report emails without user interaction, an unauthenticated remote attacker can send a crafted email with a highly compressed attachment to the monitored mailbox, causing the parsedmarc process to allocate memory proportional to the uncompressed size and exhaust available RAM.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82520.json, https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4r, https://nvd.nist.gov/vuln/detail/CVE-2026-82520, https://www.vulncheck.com/advisories/parsedmarc-zip-bomb-dos-via-compressed-email-attachments, https://github.com/domainaware/parsedmarc/releases/tag/11.0.1, https://github.com/domainaware/parsedmarc

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -09c88ca2a36af198ebcc85413ce2fa92ff555093

    Affected versions

    11.0.0

    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
    CVE-2026-82520 | CVE-DB