CVE-2026-48527

HIGHNVD 8.78.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.4% (30th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.7Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions up to and including 26.0.0 are affected by a stored cross-site scripting (XSS) vulnerability in the /system/api/saveNode endpoint. An authenticated user with a permission to edit pages can bypass the HTML sanitizer by injecting an event handler attribute without whitespace before the attribute name. @haxtheweb/haxcms-nodejs 26.0.1 and haxcms-php 26.0.2 patch the issue.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
55
EG Risk 55/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity87% × 45%
Impact severity (EG Severity): CVSS 8.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.

EG Severity
8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 29, 2026

Last Modified

July 21, 2026

Advisory Details (1)

Auto-updated Jun 2, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Stored Cross-Site Scripting (XSS) bypass in saveNode endpoint · Advisory · haxtheweb/issues · GitHub

https://github.com/haxtheweb/issues/security/advisories/GHSA-g2g8-95qg-v35h

Vendor Advisories for CVE-2026-48527(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@haxtheweb/haxcms-nodejs—
  • every version up to 26.0.1: fixed in 26.0.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 181 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  2. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  3. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  4. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-18 03:34 UTCEG score recompute
  8. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-17 12:19 UTCEG score recompute
  10. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  13. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  14. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-12 16:00 UTCEG score recompute
  16. 2026-10-11 19:44 UTCEG score recompute
  17. 2026-10-11 16:58 UTCEG score recompute
  18. 2026-10-11 14:22 UTCEG score recompute
  19. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  20. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  21. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 29th percentile
Show 75 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  5. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-09-14 06:27 UTCEG score recompute
  15. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  27. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-08-25 04:28 UTCEG score recompute
  32. 2026-08-23 14:17 UTCEG score recompute
  33. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-08-20 23:39 UTCEG score recompute
  36. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  37. 2026-08-20 10:29 UTCEG score recompute
  38. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  39. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  41. 2026-08-17 06:54 UTCEG score recompute
  42. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-16 08:20 UTCEG score recompute
  44. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-08-15 02:21 UTCEG score recompute
  46. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-14 00:37 UTCEG score recompute
  48. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-12 15:05 UTCEG score recompute
  50. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-12 02:13 UTCEG score recompute
  52. 2026-08-11 13:21 UTCEG score recompute
  53. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  54. 2026-08-09 16:17 UTCEG score recompute
  55. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-09 03:26 UTCEG score recompute
  57. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  58. 2026-08-08 01:43 UTCEG score recompute
  59. 2026-08-06 23:59 UTCEG score recompute
  60. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  61. 2026-08-05 20:44 UTCEG score recompute
  62. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  63. 2026-08-04 23:17 UTCEG score recompute
  64. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  65. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  66. 2026-08-03 18:42 UTCEG score recompute
  67. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  68. 2026-08-02 02:57 UTCEG score recompute
  69. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  70. 2026-08-01 14:06 UTCEG score recompute
  71. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-07-31 05:55 UTCEG score recompute
  73. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  74. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  75. 2026-07-29 12:03 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-48527?
CVE-2026-48527 is a high-severity vulnerability; its CVE record was published on May 29, 2026. HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions up to and including 26.0.0 are affected by a stored cross-site scripting (XSS) vulnerability in the /system/api/saveNode endpoint. An authenticated user with a permission to edit pages can bypass the HTML sanitizer by…
When was the CVE record for CVE-2026-48527 published?
The CVE record for CVE-2026-48527 was published on May 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 21, 2026; the record at its source may have been updated since.
Is CVE-2026-48527 actively exploited?
CVE-2026-48527 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48527?
CVE-2026-48527 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-48527?
A fix for CVE-2026-48527 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48527 are linked in the Vendor Advisories panel on this page.

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