4.8

CVE-2026-0256: palo alto networks pan-os Cross-site Scripting

CVSS: 4.8v3.1MediumAnalyzed
Published 13-05-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-0256 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in palo alto networks pan-os. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.3% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

A stored 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 impacted by this vulnerability.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

-0.01 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Palo alto networks1 product
  • pan-os≥ 12.1.0, < 12.1.7 | ≥ 11.2.0, < 11.2.12 | ≥ 11.1.0, < 11.1.15 | ≥ 10.2.0, < 10.2.18-h6
Paloaltonetworks1 product
  • pan-osEOL< 10.2.7 | ≥ 10.2.8, < 10.2.10 | ≥ 10.2.11, < 10.2.13 | ≥ 10.2.14, < 10.2.16 | 10.2.7 | 10.2.7:h1 | 10.2.7:h10 | 10.2.7:h11 | 10.2.7:h12 | 10.2.7:h13 | 10.2.7:h14 | 10.2.7:h15 | 10.2.7:h16 | 10.2.7:h17 | 10.2.7:h18 | 10.2.7:h19 | 10.2.7:h2 | 10.2.7:h20 | 10.2.7:h21 | 10.2.7:h22 | 10.2.7:h23 | 10.2.7:h24 | 10.2.7:h3 | 10.2.7:h32 | 10.2.7:h4 | 10.2.7:h5 | 10.2.7:h6 | 10.2.7:h7 | 10.2.7:h8 | 10.2.7:h9 | 10.2.10 | 10.2.10:h1 | 10.2.10:h10 | 10.2.10:h11 | 10.2.10:h12 | 10.2.10:h13 | 10.2.10:h14 | 10.2.10:h17 | 10.2.10:h18 | 10.2.10:h2 | 10.2.10:h21 | 10.2.10:h27 | 10.2.10:h3 | 10.2.10:h30 | 10.2.10:h31 | 10.2.10:h4 | 10.2.10:h5 | 10.2.10:h6 | 10.2.10:h7 | 10.2.10:h8 | 10.2.13 | 10.2.13:h1 | 10.2.13:h10 | 10.2.13:h15 | 10.2.13:h16 | 10.2.13:h18 | 10.2.13:h2 | 10.2.13:h3 | 10.2.13:h4 | 10.2.13:h5 | 10.2.13:h7 | 10.2.16 | 10.2.16:h1 | 10.2.16:h4 | 10.2.16:h6 | 10.2.17 | 10.2.18 | 10.2.18:h1 | 10.2.18:h5 | ≥ 11.1.0, < 11.1.4 | ≥ 11.1.5, < 11.1.6 | ≥ 11.1.8, < 11.1.10 | ≥ 11.1.11, < 11.1.13 | 11.1.4 | 11.1.4:h1 | 11.1.4:h10 | 11.1.4:h11 | 11.1.4:h12 | 11.1.4:h13 | 11.1.4:h15 | 11.1.4:h16 | 11.1.4:h17 | 11.1.4:h18 | 11.1.4:h2 | 11.1.4:h25 | 11.1.4:h27 | 11.1.4:h3 | 11.1.4:h32 | 11.1.4:h4 | 11.1.4:h5 | 11.1.4:h6 | 11.1.4:h7 | 11.1.4:h8 | 11.1.4:h9 | 11.1.6 | 11.1.6:h1 | 11.1.6:h10 | 11.1.6:h14 | 11.1.6:h17 | 11.1.6:h18 | 11.1.6:h19 | 11.1.6:h2 | 11.1.6:h20 | 11.1.6:h21 | 11.1.6:h22 | 11.1.6:h23 | 11.1.6:h25 | 11.1.6:h29 | 11.1.6:h3 | 11.1.6:h4 | 11.1.6:h5 | 11.1.6:h6 | 11.1.6:h7 | 11.1.7 | 11.1.7:h1 | 11.1.7:h2 | 11.1.7:h4 | 11.1.10 | 11.1.10:h1 | 11.1.10:h10 | 11.1.10:h12 | 11.1.10:h21 | 11.1.10:h4 | 11.1.10:h5 | 11.1.10:h7 | 11.1.10:h9 | 11.1.13 | 11.1.13:h1 | 11.1.13:h2 | 11.1.13:h3 | 11.1.14 | ≥ 11.2.0, < 11.2.4 | ≥ 11.2.5, < 11.2.7 | ≥ 11.2.8, < 11.2.10 | 11.2.4 | 11.2.4:h1 | 11.2.4:h10 | 11.2.4:h11 | 11.2.4:h12 | 11.2.4:h14 | 11.2.4:h15 | 11.2.4:h2 | 11.2.4:h3 | 11.2.4:h4 | 11.2.4:h5 | 11.2.4:h6 | 11.2.4:h7 | 11.2.4:h8 | 11.2.4:h9 | 11.2.7 | 11.2.7:h1 | 11.2.7:h10 | 11.2.7:h11 | 11.2.7:h12 | 11.2.7:h2 | 11.2.7:h3 | 11.2.7:h4 | 11.2.7:h7 | 11.2.7:h8 | 11.2.10 | 11.2.10:h1 | 11.2.10:h2 | 11.2.10:h3 | 11.2.10:h4 | 11.2.10:h5 | 11.2.11 | ≥ 12.1.0, < 12.1.4 | ≥ 12.1.5, < 12.1.7 | 12.1.4 | 12.1.4:h2 | 12.1.4:h3
Siemens1 product

3 vendors · 3 products

References

2 links