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PatchSiren cyber security CVE debrief

CVE-2026-0239 Palo Alto Networks CVE debrief

CVE-2026-0239 is an information disclosure vulnerability in the Chronosphere Chronocollector. An unauthenticated attacker with network access can retrieve sensitive information. This vulnerability has a CVSS score of 4.9, indicating medium severity. The vulnerability allows an unauthenticated attacker with network access to the collector service to retrieve sensitive information. Users should assess the vulnerability and apply mitigations. Review the official advisory and CVE record for additional details. Consider exposure review and compensating controls. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Vendor
Palo Alto Networks
Product
Chronosphere Chronocollector
CVSS
MEDIUM 4.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-13
Original CVE updated
2026-07-13
Advisory published
2026-05-13
Advisory updated
2026-07-13

Who should care

Users of Chronosphere Chronocollector, particularly those with deployments in managed environments, should assess the vulnerability and apply mitigations. Security teams and operators managing this platform should review the official advisory and CVE record.

Technical summary

The vulnerability allows an unauthenticated attacker with network access to the collector service to retrieve sensitive information. The CVSS score is 4.9, indicating a medium severity. No additional technical details are available beyond CVE and NVD information.

Defensive priority

Apply vendor-provided mitigations and monitor for suspicious activity with a focus on exposure review and compensating controls.

Recommended defensive actions

  • Apply the vendor-provided patch or mitigation
  • Monitor for suspicious activity
  • Review and update access controls
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-05-13T19:16:57.573Z and last modified on 2026-07-13T14:51:07.967Z. The information disclosure vulnerability in the Chronosphere Chronocollector allows an unauthenticated attacker with network access to the collector service to retrieve sensitive information. Evidence is limited to CVE and NVD details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-0239 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-0239

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-0239 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0239

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.