CVE-2026-0266

MEDIUMNVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory (severity: LOW) published 2026-06-11. NVD baseline CVSS 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
22(Track)
EG Risk 22/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 10, 2026

Last Modified

August 11, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
No patch confirmed yet.
generic

CVE-2026-0266 PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

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

Vendor Advisories for CVE-2026-0266(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 66× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 155 total refreshes for this CVE.

  1. 2026-08-30 01:21 UTCEPSS rescore
  2. 2026-08-28 21:40 UTCEPSS rescore
  3. 2026-08-27 14:24 UTCEPSS rescore
  4. 2026-08-25 13:48 UTCEPSS rescore
  5. 2026-08-25 00:19 UTCEG score recompute
  6. 2026-08-25 00:19 UTCGHSA enrichment
  7. 2026-08-23 10:46 UTCEG score recompute
  8. 2026-08-23 10:46 UTCGHSA enrichment
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-21 23:48 UTCEPSS rescore
  11. 2026-08-21 17:54 UTCGHSA enrichment
  12. 2026-08-20 17:16 UTCEG score recompute
  13. 2026-08-20 17:16 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 14:56 UTCEG score recompute
  16. 2026-08-19 14:56 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 15:09 UTCEG score recompute
  19. 2026-08-17 15:09 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 14:44 UTCEG score recompute
  22. 2026-08-16 14:44 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 14:16 UTCEG score recompute
  25. 2026-08-15 14:16 UTCGHSA enrichment
Show 75 more
  1. 2026-08-15 01:30 UTCEPSS rescore
  2. 2026-08-14 13:51 UTCEG score recompute
  3. 2026-08-14 13:51 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 13:27 UTCEG score recompute
  6. 2026-08-13 13:27 UTCGHSA enrichment
  7. 2026-08-12 13:50 UTCEPSS rescore
  8. 2026-08-12 13:03 UTCEG score recompute
  9. 2026-08-12 13:03 UTCGHSA enrichment
  10. 2026-08-11 13:42 UTCEPSS rescore
  11. 2026-08-11 12:38 UTCEG score recompute
  12. 2026-08-11 12:38 UTCGHSA enrichment
  13. 2026-08-10 23:59 UTCEPSS rescore
  14. 2026-08-10 22:01 UTCGHSA enrichment
  15. 2026-08-09 21:37 UTCEG score recompute
  16. 2026-08-09 21:37 UTCGHSA enrichment
  17. 2026-08-09 13:46 UTCEPSS rescore
  18. 2026-08-08 21:13 UTCEG score recompute
  19. 2026-08-08 21:13 UTCGHSA enrichment
  20. 2026-08-08 16:37 UTCEPSS rescore
  21. 2026-08-07 20:48 UTCEG score recompute
  22. 2026-08-07 20:48 UTCGHSA enrichment
  23. 2026-08-06 20:24 UTCEG score recompute
  24. 2026-08-06 20:24 UTCGHSA enrichment
  25. 2026-08-06 13:46 UTCEPSS rescore
  26. 2026-08-05 20:00 UTCEG score recompute
  27. 2026-08-05 20:00 UTCGHSA enrichment
  28. 2026-08-05 19:17 UTCEPSS rescore
  29. 2026-08-04 15:54 UTCEG score recompute
  30. 2026-08-04 15:54 UTCGHSA enrichment
  31. 2026-08-04 15:09 UTCEPSS rescore
  32. 2026-08-04 10:38 UTCEPSS rescore
  33. 2026-08-03 14:50 UTCEG score recompute
  34. 2026-08-03 14:50 UTCGHSA enrichment
  35. 2026-08-03 10:35 UTCEPSS rescore
  36. 2026-08-02 11:04 UTCEG score recompute
  37. 2026-08-02 11:04 UTCGHSA enrichment
  38. 2026-08-02 02:26 UTCEPSS rescore
  39. 2026-08-01 10:40 UTCEG score recompute
  40. 2026-08-01 10:40 UTCGHSA enrichment
  41. 2026-08-01 04:15 UTCEPSS rescore
  42. 2026-07-31 10:11 UTCEG score recompute
  43. 2026-07-31 10:11 UTCGHSA enrichment
  44. 2026-07-30 16:27 UTCEPSS rescore
  45. 2026-07-30 09:45 UTCEG score recompute
  46. 2026-07-30 09:45 UTCGHSA enrichment
  47. 2026-07-30 01:30 UTCEPSS rescore
  48. 2026-07-29 09:03 UTCEG score recompute
  49. 2026-07-29 09:03 UTCGHSA enrichment
  50. 2026-07-28 15:36 UTCEPSS rescore
  51. 2026-07-28 08:37 UTCEG score recompute
  52. 2026-07-28 08:37 UTCGHSA enrichment
  53. 2026-07-27 14:13 UTCEPSS rescore
  54. 2026-07-27 08:06 UTCEG score recompute
  55. 2026-07-27 08:06 UTCGHSA enrichment
  56. 2026-07-26 14:54 UTCEPSS rescore
  57. 2026-07-26 14:54 UTCEPSS rescore
  58. 2026-07-26 05:18 UTCEG score recompute
  59. 2026-07-26 05:18 UTCGHSA enrichment
  60. 2026-07-25 14:17 UTCEPSS rescore
  61. 2026-07-24 14:17 UTCEPSS rescore
  62. 2026-07-23 14:18 UTCEPSS rescore
  63. 2026-07-23 03:04 UTCEG score recompute
  64. 2026-07-22 14:08 UTCEPSS rescore
  65. 2026-07-21 15:24 UTCEPSS rescore
  66. 2026-07-20 17:08 UTCEPSS rescore
  67. 2026-07-19 14:30 UTCEPSS rescore
  68. 2026-07-19 02:28 UTCEPSS rescore
  69. 2026-07-18 10:04 UTCEPSS rescore
  70. 2026-07-16 23:32 UTCGHSA enrichment
  71. 2026-07-16 17:02 UTCEPSS rescore
  72. 2026-07-15 19:51 UTCEG score recompute▲ 3.70
  73. 2026-07-15 19:51 UTCGHSA enrichment
  74. 2026-07-15 16:57 UTCEPSS rescore
  75. 2026-07-15 02:00 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-0266?
CVE-2026-0266 is a medium vulnerability published on June 10, 2026. 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…
When was CVE-2026-0266 disclosed?
CVE-2026-0266 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-0266 actively exploited?
CVE-2026-0266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-0266?
CVE-2026-0266 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-0266?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-0266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-0266

Explore →

Is Your Infrastructure Affected by CVE-2026-0266?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs