CVE-2026-45687

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 89% 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
8.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.5Exploit: NoneExposed: 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, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's sendFileMessage DDP method passes the entire attacker-supplied file object into Uploads.updateFileComplete, which merges it directly into a MongoDB $set update via Object.assign. There is no allow-list of writable fields. An attacker can therefore rewrite any column on their own upload record, notably store and the store-specific path fields. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.

CVSS v3
8.5
EG Score
8.5(medium)
EPSS
10.6%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 24, 2026
Patch available. Sources: github.
github Patch Available

Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage · Advisory · RocketChat/Rocket.Chat · GitHub

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-fhc2-x8cp-c5ch

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 50× 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. 2026-07-11 19:25 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 06:23 UTCEG score recompute
  4. 2026-07-10 17:18 UTCEG score recompute
  5. 2026-07-10 04:15 UTCEG score recompute
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-09 15:13 UTCEG score recompute
  8. 2026-07-09 02:08 UTCEG score recompute
  9. 2026-07-08 15:16 UTCEPSS rescore
  10. 2026-07-08 13:06 UTCEG score recompute
  11. 2026-07-08 00:02 UTCEG score recompute
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-07 10:59 UTCEG score recompute
  14. 2026-07-06 21:30 UTCEG score recompute
  15. 2026-07-06 16:27 UTCEPSS rescore
  16. 2026-07-06 08:25 UTCEG score recompute
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-05 19:19 UTCEG score recompute
  19. 2026-07-05 06:16 UTCEG score recompute
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 17:13 UTCEG score recompute
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-04 04:09 UTCEG score recompute
  24. 2026-07-03 14:58 UTCEG score recompute
  25. 2026-07-03 01:52 UTCEG score recompute
Show 25 more
  1. 2026-07-02 12:50 UTCEG score recompute
  2. 2026-07-01 23:47 UTCEG score recompute
  3. 2026-07-01 15:07 UTCEPSS rescore
  4. 2026-07-01 10:45 UTCEG score recompute
  5. 2026-06-30 23:22 UTCEPSS rescore
  6. 2026-06-30 21:41 UTCEG score recompute
  7. 2026-06-30 08:39 UTCEG score recompute
  8. 2026-06-29 19:32 UTCEG score recompute
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-29 06:30 UTCEG score recompute
  12. 2026-06-28 17:24 UTCEG score recompute
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-28 04:56 UTCEPSS rescore
  16. 2026-06-28 04:21 UTCEG score recompute
  17. 2026-06-27 15:18 UTCEG score recompute
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-27 02:16 UTCEG score recompute
  20. 2026-06-26 13:13 UTCEG score recompute
  21. 2026-06-26 00:09 UTCEG score recompute
  22. 2026-06-25 13:49 UTCEPSS rescore
  23. 2026-06-25 11:06 UTCEG score recompute
  24. 2026-06-24 22:03 UTCEG score recompute
  25. 2026-06-24 22:03 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-45687?
CVE-2026-45687 is a high vulnerability published on June 24, 2026. Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's sendFileMessage DDP method passes the entire attacker-supplied file object into Uploads.updateFileComplete, which merges it…
When was CVE-2026-45687 disclosed?
CVE-2026-45687 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45687 actively exploited?
CVE-2026-45687 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45687?
CVE-2026-45687 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-45687?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45687, 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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