CVE-2026-18236

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 69% 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
Trending — 3 sources updated this week
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

A vulnerability in the Agent Development Kit (ADK) allows for continuation forgery in tool confirmations. An attacker who is able to manipulate or inject events into the session history can execute unauthorized tools by forging a tool confirmation response. This is possible because the framework did not verify if the target tool was registered to the executing agent, did not validate if the tool actually required confirmation, and did not match the confirmation arguments against the original tool call event in the history.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit c03f333769fe (google/adk-python)

Fix landed in google/adk-python commit c03f333769fe — awaiting tagged release

https://github.com/google/adk-python/commit/c03f333769feaeaa9fe8910fbe95cb9f2d513f54

Vendor Advisories for CVE-2026-18236(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 37× in last 7d / 158× 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 301 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-18236?
CVE-2026-18236 is a critical vulnerability published on July 29, 2026. A vulnerability in the Agent Development Kit (ADK) allows for continuation forgery in tool confirmations. An attacker who is able to manipulate or inject events into the session history can execute unauthorized tools by forging a tool confirmation response. This is possible because the framework…
When was CVE-2026-18236 disclosed?
CVE-2026-18236 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18236 actively exploited?
CVE-2026-18236 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 68.9% of all scored CVEs.
What is the CVSS score of CVE-2026-18236?
CVE-2026-18236 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-18236?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18236, 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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