CVE-2026-52838

LOWPre-NVD 2.62.6
EchelonGraph scoreMEDIUM confidence

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

Score 2.6 from GitHub Security Advisory (severity: LOW) published 2026-07-29. A secondary CVSS source baseline 2.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated
2.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 0.2%CVSS: 2.6Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disable_booking_message setting via a rich-text editor and later passed directly to the public booking_message view without escaping or sanitization. An authenticated administrator can store HTML or JavaScript in this field, enable disabled-booking mode, and trigger stored XSS in every unauthenticated visitor who opens the public booking page. Version 1.6.0 fixes the issue.

CVSS v3
2.6
EG Score
2.6LOWmedium confidence
EG Risk
28
EG Risk 28/100

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 (value × EchelonGraph’s weight)
Severity26% × 45%
The EG Score, 2.6 of 10.
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 or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

July 14, 2026

Last Modified

July 14, 2026

References (2)

Vendor Advisories for CVE-2026-52838(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composeralextselegidis/easyappointments—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
alextselegidis/easyappointments1.1.0 ... 1.5.2 (24 versions)
  • every version through 1.5.2: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 36× 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 122 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 22 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-12 15:58 UTCEG score recompute
  4. 2026-10-11 19:41 UTCEG score recompute
  5. 2026-10-11 16:56 UTCEG score recompute
  6. 2026-10-11 14:19 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-10-01 13:24 UTCEG score recompute
  19. 2026-10-01 13:24 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-09-28 09:22 UTCEG score recompute
  24. 2026-09-28 09:22 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  4. 2026-09-23 03:56 UTCEG score recompute
  5. 2026-09-23 03:56 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  6. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-09-18 04:54 UTCEG score recompute
  9. 2026-09-18 04:54 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  13. 2026-09-12 01:46 UTCEG score recompute
  14. 2026-09-12 01:46 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  18. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  19. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  20. 2026-09-05 21:18 UTCEG score recompute
  21. 2026-09-05 21:18 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  26. 2026-08-30 19:49 UTCEG score recompute
  27. 2026-08-30 19:49 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  28. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  30. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  31. 2026-08-27 21:33 UTCEG score recompute
  32. 2026-08-27 21:33 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  33. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  35. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  36. 2026-08-24 19:53 UTCEG score recompute
  37. 2026-08-24 19:53 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  38. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  39. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-08-21 21:36 UTCEG score recompute
  41. 2026-08-21 21:36 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  42. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  43. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-08-18 23:20 UTCEG score recompute
  45. 2026-08-18 23:20 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  48. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  50. 2026-08-16 01:04 UTCEG score recompute
  51. 2026-08-16 01:04 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  53. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  54. 2026-08-13 02:47 UTCEG score recompute
  55. 2026-08-13 02:47 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  56. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  57. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  58. 2026-08-10 04:32 UTCEG score recompute
  59. 2026-08-10 04:32 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  60. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  62. 2026-08-07 06:16 UTCEG score recompute
  63. 2026-08-07 06:16 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  64. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  65. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  66. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  68. 2026-08-04 08:00 UTCEG score recompute
  69. 2026-08-04 08:00 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  70. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  71. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  72. 2026-08-01 08:18 UTCEG score recompute
  73. 2026-08-01 08:18 UTCGHSA enrichmentGHSA-996f-334j-67g7 · GitHub severity LOW · GitHub CVSS 2.6
  74. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  75. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile

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Frequently asked(5)

What is CVE-2026-52838?
CVE-2026-52838 is a low-severity vulnerability; its CVE record was published on July 14, 2026. Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom "booking disabled" message through the booking settings page. That value is stored in the disablebookingmessage setting via a rich-text editor and later passed directly to the…
When was the CVE record for CVE-2026-52838 published?
The CVE record for CVE-2026-52838 was published on July 14, 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 14, 2026; the record at its source may have been updated since.
Is CVE-2026-52838 actively exploited?
CVE-2026-52838 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52838?
CVE-2026-52838 has a CVSS base score of 2.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-52838?
The CVE record for CVE-2026-52838 names the fix: "Version 1.6.0 fixes the issue." The vendor advisories EchelonGraph has for CVE-2026-52838 are linked in the Vendor Advisories panel on this page.

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