CVE-2026-59308

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.2% (11th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.3Exploit: None knownExposed services: Not assessed

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

In Spring AI's Semantic Cache support, the context hash used to isolate cached responses between different system prompts could allow cached responses to be shared across unrelated contexts. Affected versions: Spring AI: 2.0.0

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100CISA 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 21, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Aug 21, 2026
No fix on record yet.
generic

Semantic Cache Cross-Tenant Isolation Bypass via SHA-256 Truncation

https://spring.io/security/cve-2026-59308

Vendor Advisories for CVE-2026-59308(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 18× in last 7d / 78× 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 131 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-09 05:59 UTCEG score recompute
  3. 2026-10-09 05:59 UTCGHSA enrichment
  4. 2026-10-08 17:13 UTCEPSS rescore
  5. 2026-10-08 04:57 UTCEG score recompute
  6. 2026-10-08 04:57 UTCGHSA enrichment
  7. 2026-10-07 23:48 UTCEPSS rescore
  8. 2026-10-07 03:58 UTCEG score recompute
  9. 2026-10-07 03:58 UTCGHSA enrichment
  10. 2026-10-06 15:18 UTCEPSS rescore
  11. 2026-10-06 03:06 UTCEG score recompute
  12. 2026-10-06 03:06 UTCGHSA enrichment
  13. 2026-10-05 17:43 UTCEPSS rescore
  14. 2026-10-04 23:22 UTCEPSS rescore
  15. 2026-10-04 20:49 UTCGHSA enrichment
  16. 2026-10-03 16:43 UTCEG score recompute
  17. 2026-10-03 16:43 UTCGHSA enrichment
  18. 2026-10-03 14:26 UTCEPSS rescore
  19. 2026-10-02 17:56 UTCEPSS rescore
  20. 2026-10-02 09:40 UTCEG score recompute
  21. 2026-10-02 09:40 UTCGHSA enrichment
  22. 2026-10-01 19:50 UTCEPSS rescore
  23. 2026-10-01 08:48 UTCEG score recompute
  24. 2026-10-01 08:48 UTCGHSA enrichment
  25. 2026-09-30 15:03 UTCEPSS rescore
Show 75 more
  1. 2026-09-30 07:56 UTCEG score recompute
  2. 2026-09-30 07:56 UTCGHSA enrichment
  3. 2026-09-29 15:22 UTCEPSS rescore
  4. 2026-09-29 04:15 UTCEG score recompute
  5. 2026-09-29 04:15 UTCGHSA enrichment
  6. 2026-09-28 13:51 UTCEPSS rescore
  7. 2026-09-28 03:23 UTCEG score recompute
  8. 2026-09-28 03:23 UTCGHSA enrichment
  9. 2026-09-27 13:48 UTCEPSS rescore
  10. 2026-09-27 02:31 UTCEG score recompute
  11. 2026-09-27 02:31 UTCGHSA enrichment
  12. 2026-09-26 15:59 UTCEPSS rescore
  13. 2026-09-24 22:26 UTCEG score recompute
  14. 2026-09-24 22:26 UTCGHSA enrichment
  15. 2026-09-24 14:04 UTCEPSS rescore
  16. 2026-09-23 20:54 UTCEG score recompute
  17. 2026-09-23 20:54 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-22 20:02 UTCEG score recompute
  20. 2026-09-22 20:02 UTCGHSA enrichment
  21. 2026-09-21 19:09 UTCEG score recompute
  22. 2026-09-21 19:09 UTCGHSA enrichment
  23. 2026-09-20 20:16 UTCEPSS rescore
  24. 2026-09-20 18:16 UTCGHSA enrichment
  25. 2026-09-19 17:24 UTCEG score recompute
  26. 2026-09-19 17:24 UTCGHSA enrichment
  27. 2026-09-18 19:28 UTCEPSS rescore
  28. 2026-09-18 16:32 UTCEG score recompute
  29. 2026-09-18 16:32 UTCGHSA enrichment
  30. 2026-09-17 19:31 UTCEPSS rescore
  31. 2026-09-17 15:09 UTCGHSA enrichment
  32. 2026-09-16 14:16 UTCEG score recompute▲ 0.10
  33. 2026-09-16 14:16 UTCGHSA enrichment
  34. 2026-09-16 14:16 UTCNVD updateCVSS v3 → 4.3
  35. 2026-09-16 14:08 UTCEPSS rescore
  36. 2026-09-16 12:06 UTCEG score recompute
  37. 2026-09-16 12:06 UTCGHSA enrichment
  38. 2026-09-16 05:15 UTCEPSS rescore
  39. 2026-09-15 11:14 UTCEG score recompute
  40. 2026-09-15 11:14 UTCGHSA enrichment
  41. 2026-09-15 03:11 UTCEPSS rescore
  42. 2026-09-14 09:36 UTCEG score recompute
  43. 2026-09-14 09:36 UTCGHSA enrichment
  44. 2026-09-13 16:47 UTCEPSS rescore
  45. 2026-09-13 08:44 UTCEG score recompute
  46. 2026-09-13 08:44 UTCGHSA enrichment
  47. 2026-09-12 07:52 UTCEG score recompute
  48. 2026-09-12 07:52 UTCGHSA enrichment
  49. 2026-09-11 14:53 UTCEPSS rescore
  50. 2026-09-11 06:59 UTCEG score recompute
  51. 2026-09-11 06:59 UTCGHSA enrichment
  52. 2026-09-10 09:35 UTCEPSS rescore
  53. 2026-09-10 06:06 UTCGHSA enrichment
  54. 2026-09-09 05:11 UTCEG score recompute
  55. 2026-09-09 05:10 UTCGHSA enrichment
  56. 2026-09-08 22:01 UTCEPSS rescore
  57. 2026-09-08 04:18 UTCEG score recompute
  58. 2026-09-08 04:18 UTCGHSA enrichment
  59. 2026-09-07 16:01 UTCEPSS rescore
  60. 2026-09-07 03:25 UTCEG score recompute
  61. 2026-09-07 03:25 UTCGHSA enrichment
  62. 2026-09-06 13:47 UTCEPSS rescore
  63. 2026-09-06 02:18 UTCEG score recompute
  64. 2026-09-06 02:18 UTCGHSA enrichment
  65. 2026-09-05 01:26 UTCEG score recompute
  66. 2026-09-05 01:26 UTCGHSA enrichment
  67. 2026-09-04 05:07 UTCEPSS rescore
  68. 2026-09-04 00:33 UTCGHSA enrichment
  69. 2026-09-02 23:37 UTCEG score recompute
  70. 2026-09-02 23:37 UTCGHSA enrichment
  71. 2026-09-02 14:12 UTCEPSS rescore
  72. 2026-09-01 22:44 UTCEG score recompute
  73. 2026-09-01 22:44 UTCGHSA enrichment
  74. 2026-09-01 13:54 UTCEPSS rescore
  75. 2026-09-01 04:40 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59308?
CVE-2026-59308 is a medium vulnerability published on August 21, 2026. In Spring AI's Semantic Cache support, the context hash used to isolate cached responses between different system prompts could allow cached responses to be shared across unrelated contexts. Affected versions: Spring AI: 2.0.0
When was CVE-2026-59308 disclosed?
CVE-2026-59308 was first published on August 21, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59308 actively exploited?
CVE-2026-59308 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59308?
CVE-2026-59308 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-59308?
No fix for CVE-2026-59308 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-59308 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-59308

Explore →

Is Your Infrastructure Affected by CVE-2026-59308?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs