CVE-2026-48552

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-12. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
19th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 12, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

Nagios Core / XI DOM-based XSS via jsonquery.js | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nagios-core-xi-dom-based-xss-via-jsonquery-js
generic

nagioscore/Changelog at master · NagiosEnterprises/nagioscore · GitHub

https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog
generic

Nagios Core Security Disclosures | Nagios Enterprises

https://www.nagios.com/security-disclosures/nagios-core/

Vendor Advisories for CVE-2026-48552(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nagios44.4.6-4, 4.4.6-4+deb12u1, 4.4.6-4.1, 4.5.12+ds-1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nagios44.4.6-4.1, 4.4.6-4.1+deb13u1, 4.5.12+ds-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nagios44.4.6-4.1, 4.5.12+ds-1
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 69× 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 139 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-48552?
CVE-2026-48552 is a medium vulnerability published on August 12, 2026. Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
When was CVE-2026-48552 disclosed?
CVE-2026-48552 was first published on August 12, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48552 actively exploited?
CVE-2026-48552 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48552?
CVE-2026-48552 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48552?
No fix for CVE-2026-48552 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-48552 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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