CVE-2026-17459

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-07-26. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A vulnerability was determined in perwendel spark up to 2.9.4. This vulnerability affects the function staticFiles.externalLocation of the file src/main/java/spark/resource/ExternalResourceHandler.jav of the component SparkJava. Executing a manipulation can lead to symlink following. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

July 26, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Jul 26, 2026
No patch confirmed yet.
generic

GitHub - perwendel/spark: A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin · GitHub

https://github.com/perwendel/spark/
generic

SparkJava External Static Files Symlink Escape Allows Local File Read Outside Static Root · Issue #1296 · perwendel/spark · GitHub

https://github.com/perwendel/spark/issues/1296

Vendor Advisories for CVE-2026-17459(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 17× in last 7d / 70× 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. 2026-09-15 09:17 UTCEG score recompute
  2. 2026-09-15 09:17 UTCGHSA enrichment
  3. 2026-09-13 21:21 UTCEG score recompute
  4. 2026-09-13 21:21 UTCGHSA enrichment
  5. 2026-09-13 16:46 UTCEPSS rescore
  6. 2026-09-12 18:42 UTCEG score recompute
  7. 2026-09-12 18:42 UTCGHSA enrichment
  8. 2026-09-12 15:00 UTCEPSS rescore
  9. 2026-09-11 16:20 UTCEG score recompute
  10. 2026-09-11 16:20 UTCGHSA enrichment
  11. 2026-09-11 14:52 UTCEPSS rescore
  12. 2026-09-11 09:36 UTCEPSS rescore
  13. 2026-09-10 13:15 UTCEG score recompute
  14. 2026-09-10 13:15 UTCGHSA enrichment
  15. 2026-09-10 09:34 UTCEPSS rescore
  16. 2026-09-09 08:28 UTCEG score recompute
  17. 2026-09-09 08:28 UTCGHSA enrichment
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-08 02:22 UTCEG score recompute
  20. 2026-09-08 02:22 UTCGHSA enrichment
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 23:59 UTCEG score recompute
  23. 2026-09-06 23:59 UTCGHSA enrichment
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-05 19:17 UTCEG score recompute
Show 75 more
  1. 2026-09-05 19:17 UTCGHSA enrichment
  2. 2026-09-04 12:37 UTCEG score recompute
  3. 2026-09-04 12:37 UTCGHSA enrichment
  4. 2026-09-04 05:06 UTCEPSS rescore
  5. 2026-09-02 14:11 UTCEPSS rescore
  6. 2026-09-01 23:05 UTCEG score recompute
  7. 2026-09-01 23:05 UTCGHSA enrichment
  8. 2026-09-01 13:53 UTCEPSS rescore
  9. 2026-09-01 04:39 UTCEPSS rescore
  10. 2026-08-31 02:22 UTCEG score recompute
  11. 2026-08-31 02:22 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-29 23:59 UTCEG score recompute
  15. 2026-08-29 23:59 UTCGHSA enrichment
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 21:03 UTCEG score recompute
  18. 2026-08-27 21:03 UTCGHSA enrichment
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 15:31 UTCEG score recompute
  21. 2026-08-26 15:31 UTCGHSA enrichment
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:48 UTCEPSS rescore
  24. 2026-08-25 13:09 UTCEG score recompute
  25. 2026-08-25 13:09 UTCGHSA enrichment
  26. 2026-08-24 10:46 UTCEG score recompute
  27. 2026-08-24 10:46 UTCGHSA enrichment
  28. 2026-08-23 08:20 UTCEG score recompute
  29. 2026-08-23 08:20 UTCGHSA enrichment
  30. 2026-08-23 00:19 UTCEPSS rescore
  31. 2026-08-22 05:58 UTCEG score recompute
  32. 2026-08-22 05:58 UTCGHSA enrichment
  33. 2026-08-21 23:49 UTCEPSS rescore
  34. 2026-08-21 03:35 UTCEG score recompute
  35. 2026-08-21 03:35 UTCGHSA enrichment
  36. 2026-08-20 22:55 UTCEPSS rescore
  37. 2026-08-20 01:13 UTCEG score recompute
  38. 2026-08-20 01:13 UTCGHSA enrichment
  39. 2026-08-19 17:03 UTCEPSS rescore
  40. 2026-08-18 22:49 UTCEG score recompute
  41. 2026-08-18 22:49 UTCGHSA enrichment
  42. 2026-08-18 13:48 UTCEPSS rescore
  43. 2026-08-17 20:17 UTCEG score recompute
  44. 2026-08-17 20:17 UTCGHSA enrichment
  45. 2026-08-17 13:47 UTCEPSS rescore
  46. 2026-08-16 15:42 UTCEG score recompute
  47. 2026-08-16 15:42 UTCGHSA enrichment
  48. 2026-08-16 14:56 UTCEPSS rescore
  49. 2026-08-16 02:14 UTCEPSS rescore
  50. 2026-08-15 13:20 UTCEG score recompute
  51. 2026-08-15 13:20 UTCGHSA enrichment
  52. 2026-08-15 01:30 UTCEPSS rescore
  53. 2026-08-14 10:58 UTCEG score recompute
  54. 2026-08-14 10:58 UTCGHSA enrichment
  55. 2026-08-13 22:00 UTCEPSS rescore
  56. 2026-08-13 08:36 UTCEG score recompute
  57. 2026-08-13 08:36 UTCGHSA enrichment
  58. 2026-08-12 13:50 UTCEPSS rescore
  59. 2026-08-12 06:14 UTCEG score recompute
  60. 2026-08-12 06:14 UTCGHSA enrichment
  61. 2026-08-11 13:42 UTCEPSS rescore
  62. 2026-08-11 03:52 UTCEG score recompute
  63. 2026-08-11 03:52 UTCGHSA enrichment
  64. 2026-08-11 00:00 UTCEPSS rescore
  65. 2026-08-10 01:30 UTCEG score recompute
  66. 2026-08-10 01:30 UTCGHSA enrichment
  67. 2026-08-09 13:46 UTCEPSS rescore
  68. 2026-08-08 23:09 UTCGHSA enrichment
  69. 2026-08-07 20:47 UTCEG score recompute
  70. 2026-08-07 20:47 UTCGHSA enrichment
  71. 2026-08-06 18:25 UTCEG score recompute
  72. 2026-08-06 18:25 UTCGHSA enrichment
  73. 2026-08-06 13:46 UTCEPSS rescore
  74. 2026-08-05 19:17 UTCEPSS rescore
  75. 2026-08-05 16:03 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-17459?
CVE-2026-17459 is a medium vulnerability published on July 26, 2026. A vulnerability was determined in perwendel spark up to 2.9.4. This vulnerability affects the function staticFiles.externalLocation of the file src/main/java/spark/resource/ExternalResourceHandler.jav of the component SparkJava. Executing a manipulation can lead to symlink following. It is possible…
When was CVE-2026-17459 disclosed?
CVE-2026-17459 was first published in the National Vulnerability Database on July 26, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17459 actively exploited?
CVE-2026-17459 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 75.3% of all scored CVEs.
What is the CVSS score of CVE-2026-17459?
CVE-2026-17459 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-17459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17459, 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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