CVE-2026-63096

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2026-07-17. the CNA's CVSS baseline 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: Elevated riskExposed: 0

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

Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName parameter to the legacy media download endpoint. Attackers can exploit distinguishable error response classes and leaked internal IP addresses in error messages to perform blind port scanning and enumerate internal network topology.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
57(Attend)
EG Risk 57/100SSVC: Attend

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
Severity58% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
No patch confirmed yet.
generic

Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/dendrite-ssrf-via-unauthenticated-legacy-media-download-endpoint
generic

oss/dendrite.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/dendrite.md#finding-2-unauthenticated-ssrf-and-internal-port-scanner-via-legacy-_matrixmediar0download

Vendor Advisories for CVE-2026-63096(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 10× in last 7d / 64× 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 136 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63096?
CVE-2026-63096 is a medium vulnerability published on July 17, 2026. Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName parameter to the legacy media download endpoint. Attackers can…
When was CVE-2026-63096 disclosed?
CVE-2026-63096 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63096 actively exploited?
CVE-2026-63096 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 73.5% of all scored CVEs.
What is the CVSS score of CVE-2026-63096?
CVE-2026-63096 has a CVSS v4.0 base score of 5.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63096?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63096, 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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