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High 2 vendors · 2 advisories

CVE-2026-45623: Information Disclosure at postcss Dependency in Bamboo Data Center

CVE-2026-45623 key facts

CISA KEV
Not listed (catalogue checked )
Highest advisory rating
High
CVSS base score
7.5 (Atlassian), 7.5 (Red Hat)
Fixed releases
  • Atlassian: Bamboo Data Center and Server: 12.1.11 (LTS) recommended Data Center Only, Bamboo Data Center and Server: 10.2.23 (LTS) Data Center Only
  • Red Hat: 8.5.12, rh-podman-desktop-0:1.1.2-1.el10_2, foreman-0:3.18.0.14-1.el9sat, cluster-observability-operator/prometheus-rhel9:1790857922, multicluster-engine/console-mce-rhel9:1786911977, multicluster-engine/console-mce-rhel9:1786668856 and 44 more in the advisory
Vendor advisories
2 from Atlassian, Red Hat
Listed by VulniPulse
Record changed

Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-45623; each belongs to its advisory, not to every product listed. How records are collected and checked.

How do I fix CVE-2026-45623?

Upgrade to a fixed release named by the vendor:

  • Atlassian: Bamboo Data Center and Server: 12.1.11 (LTS) recommended Data Center Only, Bamboo Data Center and Server: 10.2.23 (LTS) Data Center Only
  • Red Hat: 8.5.12, rh-podman-desktop-0:1.1.2-1.el10_2, foreman-0:3.18.0.14-1.el9sat, cluster-observability-operator/prometheus-rhel9:1790857922, multicluster-engine/console-mce-rhel9:1786911977, multicluster-engine/console-mce-rhel9:1786668856
  • Upgrade to a fixed version listed by Atlassian: Bamboo Data Center and Server: 12.1.11 (LTS) recommended Data Center Only; Bamboo Data Center and Server: 10.2.23 (LTS) Data Center Only. (Atlassian)

Vendor advisories for CVE-2026-45623

Atlassian

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-45623] Information Disclosure at postcss Dependency in Bamboo Data Center

    CVE-2026-45623Source published

    Information Disclosure at postcss Dependency in Bamboo Data Center. Affected: Bamboo Data Center and Server. Listed in Atlassian's Security Bulletin of September 15 2026.

    Affected products in this advisory
    • Bamboo Data Center and Server
    Source-reported affected versions
    • Bamboo Data Center and Server: 12.1.0 to 12.1.10 (LTS)
    • Bamboo Data Center and Server: 12.0.0 to 12.0.2
    • Bamboo Data Center and Server: 11.0.0 to 11.0.8
    • Bamboo Data Center and Server: 10.2.0 to 10.2.22 (LTS)

    2 more entries in the full advisory.

    Source-reported fixed versions
    • Bamboo Data Center and Server: 12.1.11 (LTS) recommended Data Center Only
    • Bamboo Data Center and Server: 10.2.23 (LTS) Data Center Only
    Mitigation guidance
    • Upgrade to a fixed version listed by Atlassian: Bamboo Data Center and Server: 12.1.11 (LTS) recommended Data Center Only; Bamboo Data Center and Server: 10.2.23 (LTS) Data Center Only.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-45623] Information disclosure and denial of service via crafted CSS input

    CVE-2026-45623Source published Source updated

    PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. In versions 8.5.11 and prior, the PreviousMap parses the /*# sourceMappingURL=PATH */ comment from any CSS string passed to process() and dereferences PATH against the local filesystem with no scheme, allowlist, or traversal check. An attacker who controls the CSS input can cause the host process to read any file readable by Node and leak the first ~10 bytes of its content through the resulting JSON.parse SyntaxError message. The bug also yields a precise file-existence oracle and a controllable-read primitive that may be combined with large-file targets for DoS. The behaviour is triggered with PostCSS's default options — no from, no map, no plugins…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Satellite 6.19 for RHEL 9
    • Cluster Observability Operator 1.5.3
    • multicluster engine for Kubernetes 2.11

    46 more entries in the full advisory.

    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • 8.5.12
    • rh-podman-desktop-0:1.1.2-1.el10_2
    • foreman-0:3.18.0.14-1.el9sat
    • cluster-observability-operator/prometheus-rhel9:1790857922

    46 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

References

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