CVE-2026-16504

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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(medium)
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
29%
KEV
Not listed

Published

July 31, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 15, 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 40× in last 7d / 168× 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 304 total refreshes for this CVE.

  1. 2026-09-19 04:06 UTCGHSA enrichment
  2. 2026-09-18 23:13 UTCEG score recompute
  3. 2026-09-18 23:13 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 19:02 UTCGHSA enrichment
  6. 2026-09-18 14:52 UTCGHSA enrichment
  7. 2026-09-18 09:40 UTCGHSA enrichment
  8. 2026-09-18 05:26 UTCGHSA enrichment
  9. 2026-09-18 01:16 UTCEG score recompute
  10. 2026-09-18 01:16 UTCGHSA enrichment
  11. 2026-09-17 09:44 UTCGHSA enrichment
  12. 2026-09-17 05:34 UTCGHSA enrichment
  13. 2026-09-17 01:24 UTCEG score recompute
  14. 2026-09-17 01:24 UTCGHSA enrichment
  15. 2026-09-16 14:07 UTCEPSS rescore
  16. 2026-09-16 11:20 UTCGHSA enrichment
  17. 2026-09-16 05:28 UTCEG score recompute
  18. 2026-09-16 05:28 UTCGHSA enrichment
  19. 2026-09-16 05:14 UTCEPSS rescore
  20. 2026-09-15 07:12 UTCEG score recompute
  21. 2026-09-15 07:12 UTCGHSA enrichment
  22. 2026-09-15 03:02 UTCGHSA enrichment
  23. 2026-09-14 15:07 UTCGHSA enrichment
  24. 2026-09-14 10:57 UTCGHSA enrichment
  25. 2026-09-14 06:47 UTCGHSA enrichment
Show 75 more
  1. 2026-09-14 02:37 UTCGHSA enrichment
  2. 2026-09-13 22:27 UTCGHSA enrichment
  3. 2026-09-13 18:17 UTCEG score recompute
  4. 2026-09-13 18:17 UTCGHSA enrichment
  5. 2026-09-13 16:46 UTCEPSS rescore
  6. 2026-09-13 14:06 UTCGHSA enrichment
  7. 2026-09-13 09:56 UTCGHSA enrichment
  8. 2026-09-13 05:46 UTCGHSA enrichment
  9. 2026-09-13 01:36 UTCGHSA enrichment
  10. 2026-09-12 21:23 UTCGHSA enrichment
  11. 2026-09-12 17:13 UTCEG score recompute
  12. 2026-09-12 17:13 UTCGHSA enrichment
  13. 2026-09-12 15:00 UTCEPSS rescore
  14. 2026-09-12 13:03 UTCGHSA enrichment
  15. 2026-09-12 08:53 UTCGHSA enrichment
  16. 2026-09-12 04:42 UTCGHSA enrichment
  17. 2026-09-12 00:31 UTCGHSA enrichment
  18. 2026-09-11 19:20 UTCGHSA enrichment
  19. 2026-09-11 14:57 UTCEG score recompute
  20. 2026-09-11 14:57 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:36 UTCEPSS rescore
  23. 2026-09-11 06:03 UTCGHSA enrichment
  24. 2026-09-11 01:15 UTCGHSA enrichment
  25. 2026-09-10 18:56 UTCGHSA enrichment
  26. 2026-09-10 12:55 UTCEG score recompute
  27. 2026-09-10 12:55 UTCGHSA enrichment
  28. 2026-09-10 09:34 UTCEPSS rescore
  29. 2026-09-10 07:32 UTCGHSA enrichment
  30. 2026-09-10 03:22 UTCGHSA enrichment
  31. 2026-09-09 11:14 UTCGHSA enrichment
  32. 2026-09-09 07:04 UTCEG score recompute
  33. 2026-09-09 07:04 UTCGHSA enrichment
  34. 2026-09-08 22:00 UTCEPSS rescore
  35. 2026-09-08 16:13 UTCGHSA enrichment
  36. 2026-09-08 04:41 UTCGHSA enrichment
  37. 2026-09-07 23:43 UTCGHSA enrichment
  38. 2026-09-07 19:33 UTCEG score recompute
  39. 2026-09-07 19:33 UTCGHSA enrichment
  40. 2026-09-07 16:01 UTCEPSS rescore
  41. 2026-09-06 20:47 UTCGHSA enrichment
  42. 2026-09-06 15:40 UTCEG score recompute
  43. 2026-09-06 15:40 UTCGHSA enrichment
  44. 2026-09-06 13:47 UTCEPSS rescore
  45. 2026-09-06 11:29 UTCGHSA enrichment
  46. 2026-09-06 07:20 UTCGHSA enrichment
  47. 2026-09-06 03:08 UTCGHSA enrichment
  48. 2026-09-05 22:56 UTCGHSA enrichment
  49. 2026-09-05 18:46 UTCEG score recompute
  50. 2026-09-05 18:46 UTCGHSA enrichment
  51. 2026-09-05 08:55 UTCGHSA enrichment
  52. 2026-09-05 04:45 UTCGHSA enrichment
  53. 2026-09-04 14:38 UTCEG score recompute
  54. 2026-09-04 14:38 UTCGHSA enrichment
  55. 2026-09-04 10:29 UTCEG score recompute
  56. 2026-09-04 10:29 UTCGHSA enrichment
  57. 2026-09-04 05:06 UTCEPSS rescore
  58. 2026-09-04 04:01 UTCGHSA enrichment
  59. 2026-09-03 21:10 UTCGHSA enrichment
  60. 2026-09-03 09:10 UTCEG score recompute
  61. 2026-09-03 09:10 UTCGHSA enrichment
  62. 2026-09-02 14:11 UTCEPSS rescore
  63. 2026-09-02 08:11 UTCGHSA enrichment
  64. 2026-09-01 22:33 UTCEG score recompute
  65. 2026-09-01 22:33 UTCGHSA enrichment
  66. 2026-09-01 13:53 UTCEPSS rescore
  67. 2026-09-01 07:26 UTCEG score recompute
  68. 2026-09-01 07:26 UTCGHSA enrichment
  69. 2026-09-01 04:39 UTCEPSS rescore
  70. 2026-08-31 23:25 UTCGHSA enrichment
  71. 2026-08-31 07:52 UTCGHSA enrichment
  72. 2026-08-31 03:43 UTCGHSA enrichment
  73. 2026-08-30 23:33 UTCGHSA enrichment
  74. 2026-08-30 19:23 UTCEG score recompute
  75. 2026-08-30 19:23 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 September 8, 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 71.0% 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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