CVE-2026-31981

MEDIUMNVD 4.85.9▲
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-07-09. NVD baseline CVSS 4.8; sources differ by 1.1.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.9EG
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 Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data through multiple input vectors. When a victim views the affected data in the Diagram tab and Graph view, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

CVSS v3
4.8
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

July 9, 2026

Last Modified

August 11, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

NN-2026:8-01 - HTML injection in Diagram tab and Graph view in Guardian/CMC before 26.2.0 - CVE-2026-31981 | Product Security Incident Response Portal

https://security.nozominetworks.com/NN-2026:8-01

Vendor Advisories for CVE-2026-31981(1)

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 15× in last 7d / 81× 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 132 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-31981?
CVE-2026-31981 is a medium vulnerability published on July 9, 2026. A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data through multiple input…
When was CVE-2026-31981 disclosed?
CVE-2026-31981 was first published in the National Vulnerability Database on July 9, 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-2026-31981 actively exploited?
CVE-2026-31981 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 83.6% of all scored CVEs.
What is the CVSS score of CVE-2026-31981?
CVE-2026-31981 has a CVSS v3 base score of 4.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.9.
How do I remediate CVE-2026-31981?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31981, 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

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