CLEANSTART-2026-QH06524

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    CLEANSTART-2026-QH06524

    Published: 7 Nov 2026Last Modified: 7 Nov 2026
    Upstream:
    CVE-2026-21726

    Summary: CVE-2021-36156 fix validates the namespace parameter for path traversal sequences after a single URL decode, by double encoding, an attacker can read files at the Ruler API endpoint /loki/api/v1/ru...

    Details: Security vulnerability affects the grafana-alloy package. The CVE-2021-36156 fix validates the namespace parameter for path traversal sequences after a single URL decode, by double encoding, an attacker can read files at the Ruler API endpoint /loki/api/v1/rules/{namespace} Thanks to Prasanth Sundararajan for reporting this vulnerability.

    References: https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-QH06524.json, https://osv.dev/vulnerability/CVE-2026-21726, https://nvd.nist.gov/vuln/detail/CVE-2026-21726

    Affected packages

    Package

    Name: grafana-alloy

    Purl: pkg:apk/cleanstart/grafana-alloy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.21.3-r2

    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
    CLEANSTART-2026-QH06524 | CVE-DB