CVE-2026-40126

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
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: 0.6%CVSS: 4.8Exploit: None knownExposed services: Not assessed

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

OutSystems Service Center is vulnerable to a DOM-based Cross-Site Scripting (XSS) attack that can be exploited by a low-privileged attacker via the upload of a file with a malicious filename containing JavaScript code. The vulnerability exists in all locations where a file can be attached and prepared for upload to the server.

This issue was fixed in OutSystems Service Center version 11.41.2

CVSS v3
4.8
EG Score
4.8MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100CISA 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
Severity48% × 45%
Exploitation1% × 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
0.6%
EPSS %ILE
48th
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 17, 2026

Last Modified

August 28, 2026

Vendor Advisories for CVE-2026-40126(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 / 74× 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 133 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-40126?
CVE-2026-40126 is a medium vulnerability published on August 17, 2026. OutSystems Service Center is vulnerable to a DOM-based Cross-Site Scripting (XSS) attack that can be exploited by a low-privileged attacker via the upload of a file with a malicious filename containing JavaScript code. The vulnerability exists in all locations where a file can be attached and…
When was CVE-2026-40126 disclosed?
CVE-2026-40126 was first published on August 17, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40126 actively exploited?
CVE-2026-40126 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40126?
CVE-2026-40126 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-40126?
No fix for CVE-2026-40126 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-2026-40126 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-40126

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