CVE-2026-13591

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

Score 5.0 from GitHub Security Advisory (severity: LOW) published 2026-06-29. a secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.0Exploit: Elevated riskExposed: 0

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

A weakness has been identified in DeepMyst Mysti 0.4.0. Affected is the function _isTrackedConversation of the file src/managers/ChannelBridge.ts of the component Contact Tracking. This manipulation of the argument _channelType causes improper authorization. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is told to be difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 9b4aff0f106db424aa45a35aa89dd0b8f2eb9a48. It is suggested to install a patch to address this issue.

CVSS v3
5.0
EG Score
5.0(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity50% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (4)

Auto-updated Jun 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
github_pr

Fix channel-scoped OpenClaw contact tracking

Fix merged in DeepMyst/Mysti PR #43 on 2026-06-12 — awaiting tagged release

https://github.com/DeepMyst/Mysti/pull/43
generic

Cross-channel identity confusion in ChannelBridge inbound message routing · Issue #42 · DeepMyst/Mysti · GitHub

https://github.com/DeepMyst/Mysti/issues/42
github_commit

commit 9b4aff0f106d (DeepMyst/Mysti)

Fix landed in DeepMyst/Mysti commit 9b4aff0f106d — awaiting tagged release

https://github.com/DeepMyst/Mysti/commit/9b4aff0f106db424aa45a35aa89dd0b8f2eb9a48
generic

GitHub - DeepMyst/Mysti: AI coding dream team of agents for VS Code. Claude Code + openai Codex collaborate in brainstorm mode, debate solutions, and synthesize the best approach for your code. · GitHub

https://github.com/DeepMyst/Mysti/

Vendor Advisories for CVE-2026-13591(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 41× 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 169 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-13591?
CVE-2026-13591 is a medium vulnerability published on June 29, 2026. A weakness has been identified in DeepMyst Mysti 0.4.0. Affected is the function isTrackedConversation of the file src/managers/ChannelBridge.ts of the component Contact Tracking. This manipulation of the argument channelType causes improper authorization. The attack may be initiated remotely. A…
When was CVE-2026-13591 disclosed?
CVE-2026-13591 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13591 actively exploited?
CVE-2026-13591 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 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-13591?
CVE-2026-13591 has a CVSS v3 base score of 5.0 (NVD).
How do I remediate CVE-2026-13591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13591, 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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