CVE-2026-47733

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 92% of all CVEs by exploit prediction. 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
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.4Exploit: None knownExposed: 0

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

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, the ImageElement component in packages/gazzodown renders user-controlled src values directly into and attributes without protocol sanitization. Unlike the analogous LinkSpan component — which uses sanitizeUrl to block javascript:, data:, and vbscript: protocols — ImageElement passes the raw URL through unchanged. An authenticated user can post a markdown image with a javascript: URL that, if clicked on an older browser, would execute arbitrary JavaScript in the viewer's session. This vulnerability is fixed in 8.5.0.

CVSS v3
4.4
EG Score
4.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity44% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

Advisory Details (1)

Auto-updated Jun 24, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Missing URL protocol sanitization in ImageElement allows javascript: URLs in markdown images · Advisory · RocketChat/Rocket.Chat · GitHub

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-vvrf-fq54-q4pr

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 37× 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.

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

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Frequently asked(5)

What is CVE-2026-47733?
CVE-2026-47733 is a medium vulnerability published on June 24, 2026. Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, the ImageElement component in packages/gazzodown renders user-controlled src values directly into <a href> and <img src> attributes without protocol sanitization. Unlike the analogous LinkSpan…
When was CVE-2026-47733 disclosed?
CVE-2026-47733 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47733 actively exploited?
CVE-2026-47733 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 91.9% of all scored CVEs.
What is the CVSS score of CVE-2026-47733?
CVE-2026-47733 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-47733?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47733, 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.

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