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    CVE-2026-78002

    A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful exploitation can lead to a denial of service (DoS) for the affected system.

    Published:Aug 26, 2026
    Last Modified:Sep 1, 2026
    EPS:Aug 27, 2026
    EPSS Score:0.00612
    CVSS Score:7.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Rsyslog
    Product
    Rsyslog

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers
    CAPEC-47 Buffer Overflow via Parameter Expansion

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    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