Vulnerability-Lookup

CVE-2026-0266 (GCVE-0-2026-0266)

Vulnerability from cvelistv5 – Published: 2026-06-10 20:30 – Updated: 2026-06-10 20:30

Title

PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

Summary

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.

Severity

1.1 (Low)


                        
                          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

0.4 (Low)


                        
                          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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

palo_alto

References

1 reference

URL	Tags
https://security.paloaltonetworks.com/CVE-2026-0266	vendor-advisory

Impacted products

3 products

Vendor	Product	Version
Palo Alto Networks	Cloud NGFW	Unaffected: All (custom)
Palo Alto Networks	PAN-OS	Affected: 12.1.0 , < 12.1.5 (custom) Affected: 11.2.0 , < 11.2.11 (custom) Affected: 11.1.0 , < 11.1.14 (custom) Affected: 10.2.0 (custom) cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.10:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.9:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.7:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.1:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.0:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.13:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.12:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.11:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.10:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.9:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.1:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.0:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.18:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.17:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.16:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.15:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.14:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.13:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.12:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.11:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.10:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.9:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.7:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.1:::::::* cpe:2.3:o:palo_alto_networks:pan-os:10.2.0:::::::*
Palo Alto Networks	Prisma Access	Unaffected: All (custom)

Date Public

2026-06-10 16:00

Credits

Palo Alto Networks thanks Rajnish Gupta (internal reporter), James Otten (internal reporter), and Jasper Westerman of REQON B.V. for discovering and reporting this issue.

Show details on NVD website

JSON

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              "value": "\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003eVersion\u003cbr\u003e\u003c/th\u003e\u003cth\u003eMinor Version\u003cbr\u003e\u003c/th\u003e\u003cth\u003eSuggested Solution\u003cbr\u003e\u003c/th\u003e\u003c/tr\u003e\u003c/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eCloud NGFW\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u003c/td\u003e\u003ctd\u003eNo action needed.\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\n                                \u003ctd\u003ePAN-OS 12.1\u003cbr\u003e\u003c/td\u003e\n                                \u003ctd\u003e12.1.2 through 12.1.4\u003c/td\u003e\n                                \u003ctd\u003eUpgrade to 12.1.5 or later.\u003c/td\u003e\n                            \u003c/tr\u003e\u003ctr\u003e\n                                \u003ctd\u003ePAN-OS 11.2\u003cbr\u003e\u003c/td\u003e\n                                \u003ctd\u003e11.2.0 through 11.2.10\u003c/td\u003e\n                                \u003ctd\u003eUpgrade to 11.2.11 or later.\u003c/td\u003e\n                            \u003c/tr\u003e\u003ctr\u003e\n                                \u003ctd\u003ePAN-OS 11.1\u003cbr\u003e\u003c/td\u003e\n                                \u003ctd\u003e11.1.0 through 11.1.13\u003c/td\u003e\n                                \u003ctd\u003eUpgrade to 11.1.14 or later.\u003c/td\u003e\n                            \u003c/tr\u003e\u003ctr\u003e\n                                \u003ctd\u003ePAN-OS 10.2\u003cbr\u003e\u003c/td\u003e\n                                \u003ctd\u003e10.2.0 through 10.2.18\u003c/td\u003e\n                                \u003ctd\u003eUpgrade to 11.1.14, 11.2.11, 12.1.5 or later.\u003c/td\u003e\n                            \u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eAll older\u003cbr\u003eunsupported\u003cbr\u003ePAN-OS versions\u003c/td\u003e\u003ctd\u003e\u0026nbsp;\u003c/td\u003e\u003ctd\u003eUpgrade to a supported fixed version.\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003ePrisma Access\u003cbr\u003e\u003c/td\u003e\u003ctd\u003e\u003c/td\u003e\u003ctd\u003eNo action needed.\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e"
            }
          ],
          "value": "VERSION           MINOR VERSION            SUGGESTED SOLUTION\nCloud NGFW                                 No action needed.\nPAN-OS 12.1       12.1.2 through 12.1.4    Upgrade to 12.1.5 or later.\nPAN-OS 11.2       11.2.0 through 11.2.10   Upgrade to 11.2.11 or later.\nPAN-OS 11.1       11.1.0 through 11.1.13   Upgrade to 11.1.14 or later.\nPAN-OS 10.2       10.2.0 through 10.2.18   Upgrade to 11.1.14, 11.2.11, 12.1.5 or later.\nAll older         \u00a0                        Upgrade to a supported fixed version.\nunsupported\nPAN-OS versions\nPrisma Access                              No action needed."
        }
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      "source": {
        "discovery": "EXTERNAL"
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      "timeline": [
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          "lang": "en",
          "time": "2026-06-10T16:00:00.000Z",
          "value": "Initial publication."
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      ],
      "title": "PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface",
      "workarounds": [
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          "supportingMedia": [
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              "value": "\u003cp\u003eNo known workarounds or mitigations exist for this issue.\u003c/p\u003e"
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    "assignerShortName": "palo_alto",
    "cveId": "CVE-2026-0266",
    "datePublished": "2026-06-10T20:30:04.127Z",
    "dateReserved": "2025-11-03T20:44:26.433Z",
    "dateUpdated": "2026-06-10T20:30:04.127Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-0266\",\"sourceIdentifier\":\"psirt@paloaltonetworks.com\",\"published\":\"2026-06-10T22:16:52.787\",\"lastModified\":\"2026-06-10T22:16:52.787\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS\u00ae software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. \\n\\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\\n\\nCloud NGFW and Prisma\u00ae Access are not affected by this vulnerability.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"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\",\"baseScore\":1.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"UNREPORTED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NO\",\"Recovery\":\"USER\",\"valueDensity\":\"DIFFUSE\",\"vulnerabilityResponseEffort\":\"MODERATE\",\"providerUrgency\":\"AMBER\"}}]},\"weaknesses\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://security.paloaltonetworks.com/CVE-2026-0266\",\"source\":\"psirt@paloaltonetworks.com\"}]}}"
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}

FKIE_CVE-2026-0266

Vulnerability from fkie_nvd - Published: 2026-06-10 22:16 - Updated: 2026-06-10 22:16

Severity

1.1 (Low) - 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

Summary

References

	URL	Tags
	psirt@paloaltonetworks.com	https://security.paloaltonetworks.com/CVE-2026-0266

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "descriptions": [
    {
      "lang": "en",
      "value": "A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS\u00ae software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. \n\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\n\nCloud NGFW and Prisma\u00ae Access are not affected by this vulnerability."
    }
  ],
  "id": "CVE-2026-0266",
  "lastModified": "2026-06-10T22:16:52.787",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NO",
          "Recovery": "USER",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "AMBER",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "DIFFUSE",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "MODERATE"
        },
        "source": "psirt@paloaltonetworks.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-10T22:16:52.787",
  "references": [
    {
      "source": "psirt@paloaltonetworks.com",
      "url": "https://security.paloaltonetworks.com/CVE-2026-0266"
    }
  ],
  "sourceIdentifier": "psirt@paloaltonetworks.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "psirt@paloaltonetworks.com",
      "type": "Secondary"
    }
  ]
}

GHSA-3XRX-45H3-29CM

Vulnerability from github – Published: 2026-06-11 00:32 – Updated: 2026-06-11 00:32

Details

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.

Severity

1.1 (Low)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-0266"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-10T22:16:52Z",
    "severity": "LOW"
  },
  "details": "A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS\u00ae software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. \n\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\n\nCloud NGFW and Prisma\u00ae Access are not affected by this vulnerability.",
  "id": "GHSA-3xrx-45h3-29cm",
  "modified": "2026-06-11T00:32:04Z",
  "published": "2026-06-11T00:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0266"
    },
    {
      "type": "WEB",
      "url": "https://security.paloaltonetworks.com/CVE-2026-0266"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-0266 (GCVE-0-2026-0266)

FKIE_CVE-2026-0266

GHSA-3XRX-45H3-29CM

Tags

Sightings

Nomenclature