How severe is CVE-2026-15587?

CVE-2026-15587 has a CVSS 4.0 base score of 9.4, rated critical severity.

Is CVE-2026-15587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-15587?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-15587 published?

CVE-2026-15587 was published on 2026-08-05.

CVE-2026-15587

CVE-2026-15587 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: Critical (CVSS 4.0 base score 9.4)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Published: 2026-08-05
Last modified: 2026-08-05

Description

Improper Privilege Management in Google SecOps (Chronicle SOAR) versions prior to 6.3.85 on Google Cloud Platform allows an authenticated attacker to escalate privileges to system-level administrative access using a crafted internal authentication header. This vulnerability was patched with version 6.3.85, and no customer action is needed.

Frequently asked questions

What is CVE-2026-15587?: Improper Privilege Management in Google SecOps (Chronicle SOAR) versions prior to 6.3.85 on Google Cloud Platform allows an authenticated attacker to escalate privileges to system-level administrative access using a crafted internal authentication header. This vulnerability was patched with version 6.3.85, and no customer action is needed.
How severe is CVE-2026-15587?: CVE-2026-15587 has a CVSS 4.0 base score of 9.4, rated critical severity.
Is CVE-2026-15587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-15587?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-15587 published?: CVE-2026-15587 was published on 2026-08-05.

References

https://docs.cloud.google.com/chronicle/docs/soar/release-notes#May_23_2026

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