CVE-2026-10277

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-06-01. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

A vulnerability was found in j3k0 mcp-google-workspace up to 831790e7d5c2663325733d9f5579cc339a267c4c. This issue affects the function saveToDisk of the file src/tools/gmail.ts of the component MCP Gmail Tool. Performing a manipulation results in improper access controls. It is possible to initiate the attack remotely. The exploit has been made public and could be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The patch is named 89c091ecf8b9f9c7291d1af0b1966e271f86551c. It is suggested to install a patch to address this issue.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 13, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
github_pr

fix(gmail): sandbox attachment writes under GMAIL_ATTACHMENTS_DIR

Fix merged in j3k0/mcp-google-workspace PR #22 on 2026-05-13 — awaiting tagged release

https://github.com/j3k0/mcp-google-workspace/pull/22
generic🟡 PoC Available

Arbitrary File Write Vulnerability in mcp-google-workspace Gmail Attachment Saving · Issue #19 · j3k0/mcp-google-workspace · GitHub

https://github.com/j3k0/mcp-google-workspace/issues/19
github_commit

commit 89c091ecf8b9 (j3k0/mcp-google-workspace)

Fix landed in j3k0/mcp-google-workspace commit 89c091ecf8b9 — awaiting tagged release

https://github.com/j3k0/mcp-google-workspace/commit/89c091ecf8b9f9c7291d1af0b1966e271f86551c
generic

GitHub - j3k0/mcp-google-workspace: MCP Server for Gmail and Calendar · GitHub

https://github.com/j3k0/mcp-google-workspace/

Vendor Advisories for CVE-2026-10277(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 8× 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 194 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-10277?
CVE-2026-10277 is a medium vulnerability published on June 1, 2026. A vulnerability was found in j3k0 mcp-google-workspace up to 831790e7d5c2663325733d9f5579cc339a267c4c. This issue affects the function saveToDisk of the file src/tools/gmail.ts of the component MCP Gmail Tool. Performing a manipulation results in improper access controls. It is possible to initiate…
When was CVE-2026-10277 disclosed?
CVE-2026-10277 was first published in the National Vulnerability Database on June 1, 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-2026-10277 actively exploited?
CVE-2026-10277 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 79.9% of all scored CVEs.
What is the CVSS score of CVE-2026-10277?
CVE-2026-10277 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-10277?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10277, 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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