UBUNTU-CVE-2026-119566

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    UBUNTU-CVE-2026-119566

    Published: 30 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-119566

    Summary:

    Details: Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.

    References: https://ubuntu.com/security/CVE-2026-119566, https://www.cve.org/CVERecord?id=CVE-2026-119566, https://github.com/prometheus/common/pull/901, https://abraxaslabs.tech/research/prometheus-bearer-redirect, https://github.com/prometheus/prometheus, https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/azuread.go#L326-L333, https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#L205-L216, https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-via-remote-write-cross-host-redirects

    Affected packages

    Package

    Name: golang-github-prometheus-common

    Purl: pkg:deb/ubuntu/golang-github-prometheus-common?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0+git20160104.0a3005b-1

    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
    UBUNTU-CVE-2026-119566 | CVE-DB