CVE-2026-16504

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-31. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Deployment of the VPS.org one-click Zulip template deploys a hardcoded application signing key, a default database password ("zulip"), and DISABLE_HTTPS=True.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 3, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet. Sources: cert.
cert

VU#243636 - VPS.org one-click deployment templates contain multiple vulnerabilities

https://kb.cert.org/vuls/id/243636

Vendor Advisories for CVE-2026-16504(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 144× 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 144 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16504?
CVE-2026-16504 is a critical vulnerability published on July 31, 2026. Deployment of the VPS.org one-click Zulip template deploys a hardcoded application signing key, a default database password ("zulip"), and DISABLE_HTTPS=True.
When was CVE-2026-16504 disclosed?
CVE-2026-16504 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16504 actively exploited?
CVE-2026-16504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.9% of all scored CVEs.
What is the CVSS score of CVE-2026-16504?
CVE-2026-16504 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16504?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16504, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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