CVE-2026-73059

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-16. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

stoatchat before 0.15.0 contains a permission bypass vulnerability in the message_fetch route that checks only ViewChannel permission instead of requiring ReadMessageHistory. Attackers with ViewChannel access but ReadMessageHistory denied can retrieve individual message content by ID, bypassing the intended history restriction enforced by bulk read routes.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 16, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

stoatchat before 0.15.0 Permission Bypass via message_fetch | Advisories | VulnCheck

https://www.vulncheck.com/advisories/stoatchat-before-permission-bypass-via-message-fetch
github Patch Available🟡 PoC Available

fetching a single message checks only ViewChannel, not ReadMessageHistory (bypasses a view-without-history channel restriction) · Advisory · stoatchat/stoatchat · GitHub

Affected: 0.8.2). That fix is actually why message_query and message_search now carry the R

https://github.com/stoatchat/stoatchat/security/advisories/GHSA-8qp4-h9xf-2vqr

Vendor Advisories for CVE-2026-73059(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 16× in last 7d / 73× 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 133 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-73059?
CVE-2026-73059 is a medium vulnerability published on August 16, 2026. stoatchat before 0.15.0 contains a permission bypass vulnerability in the message_fetch route that checks only ViewChannel permission instead of requiring ReadMessageHistory. Attackers with ViewChannel access but ReadMessageHistory denied can retrieve individual message content by ID, bypassing the…
When was CVE-2026-73059 disclosed?
CVE-2026-73059 was first published on August 16, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73059 actively exploited?
CVE-2026-73059 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73059?
CVE-2026-73059 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73059?
A fix for CVE-2026-73059 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73059 are linked in the Vendor Advisories panel on this page.

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