CVE-2026-0266PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
- 1.1LowCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By palo_alto
- 7 months later
· 7 months later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| palo_altoCNA (assigner) | 4.0 | Low1.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber |
| palo_altoCNA (assigner) | 4.0 | Low0.4 | CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber |
| NVDNVD · Modified | 4.0 | Low1.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 1.1.
Affected products
Palo Alto Networks · Cloud NGFW
- unaffected All
- affected 12.1.0 – < 12.1.5
- affected 11.2.0 – < 11.2.11
- affected 11.1.0 – < 11.1.14
- affected 10.2.0
Palo Alto Networks · Prisma Access
- unaffected All
What to do
Solution: VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.1 12.1.2 through 12.1.4 Upgrade to 12.1.5 or later. PAN-OS 11.2 11.2.0 through 11.2.10 Upgrade to 11.2.11 or later. PAN-OS 11.1 11.1.0 through 11.1.13 Upgrade to 11.1.14 or later. PAN-OS 10.2 10.2.0 through 10.2.18 Upgrade to 11.1.14, 11.2.11, 12.1.5 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access No action needed.
Workaround: No known workarounds or mitigations exist for this issue.
Exploitation: Palo Alto Networks is not aware of any malicious exploitation of this issue.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-36134 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-0266)Record last updated .