CVE-2026-10566

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-06-02. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: 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 FoundationAgents MetaGPT up to 0.8.2. This affects the function Message.check_instruct_content of the file metagpt/schema.py. Executing a manipulation of the argument mapping can lead to deserialization. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

[Security] Unsafe deserialization in `Message.check_instruct_content()` leads to code execution · Issue #2038 · FoundationAgents/MetaGPT · GitHub

https://github.com/FoundationAgents/MetaGPT/issues/2038
generic

GitHub - FoundationAgents/MetaGPT: 🌟 The Multi-Agent Framework: First AI Software Company, Towards Natural Language Programming · GitHub

https://github.com/FoundationAgents/MetaGPT/

Vendor Advisories for CVE-2026-10566(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipmetagpt—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
metagpt0.1 ... 0.8.2 (30 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 32× 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 183 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-10566?
CVE-2026-10566 is a medium vulnerability published on June 2, 2026. A weakness has been identified in FoundationAgents MetaGPT up to 0.8.2. This affects the function Message.checkinstructcontent of the file metagpt/schema.py. Executing a manipulation of the argument mapping can lead to deserialization. The attack is restricted to local execution. The exploit has…
When was CVE-2026-10566 disclosed?
CVE-2026-10566 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10566 actively exploited?
CVE-2026-10566 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-10566?
CVE-2026-10566 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-10566?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10566, 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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