How severe is CVE-2026-0266?

CVE-2026-0266 has a CVSS 4.0 base score of 1.1, rated low severity.

Is CVE-2026-0266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-0266?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-0266 have an EU (EUVD) identifier?

Yes. CVE-2026-0266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36134.

When was CVE-2026-0266 published?

CVE-2026-0266 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-0266

CVE-2026-0266 is a low-severity vulnerability with a CVSS 4.0 base score of 1.1. 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-79.

Key facts

Severity: Low (CVSS 4.0 base score 1.1)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36134
Weakness: CWE-79
Published: 2026-06-10
Last modified: 2026-06-17

Description

A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not affected by this vulnerability.

Frequently asked questions

What is CVE-2026-0266?: A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not affected by this vulnerability.
How severe is CVE-2026-0266?: CVE-2026-0266 has a CVSS 4.0 base score of 1.1, rated low severity.
Is CVE-2026-0266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-0266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0266 have an EU (EUVD) identifier?: Yes. CVE-2026-0266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36134.
When was CVE-2026-0266 published?: CVE-2026-0266 was published on 2026-06-10 and last updated on 2026-06-17.

References

https://security.paloaltonetworks.com/CVE-2026-0266

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