CVE-2026-52021

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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

An issue in code100xDevs 100xdevs CMS v.1.0 (2026-04-30) allows a remote attacker to obtain sensitive information via the src/middleware.ts, and src/app/api/mobile/search/route.ts components.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 20, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

CVE-2026-52021: Mobile API Authentication Bypass via Unvalidated Auth-Key Header in code100x/cms · GitHub

https://gist.github.com/itsmohitnarayan/e456399f083130962bab6c710f208437
generic

GitHub - code100x/cms: Repo for https://app.100xdevs.com/ · GitHub

https://github.com/code100x/cms

Vendor Advisories for CVE-2026-52021(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 23× in last 7d / 103× 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 151 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-52021?
CVE-2026-52021 is a high vulnerability published on August 20, 2026. An issue in code100xDevs 100xdevs CMS v.1.0 (2026-04-30) allows a remote attacker to obtain sensitive information via the src/middleware.ts, and src/app/api/mobile/search/route.ts components.
When was CVE-2026-52021 disclosed?
CVE-2026-52021 was first published on August 20, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52021 actively exploited?
CVE-2026-52021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52021?
CVE-2026-52021 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-52021?
No fix for CVE-2026-52021 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-2026-52021 are linked in the Vendor Advisories panel on this page.

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