CVE-2026-70558

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Dinky's POST /download/uploadFromRsByLocal handler passes the caller-supplied path parameter directly to new File(path) and file.transferTo(dest) with no path validation. The route is marked @SaIgnore and /download/** is excluded from the Sa-Token interceptor, so the only guard is a header equality check against a dinkyToken value whose default (efda1551-7958-4e0f-80a8-dfd107df3e38) is hardcoded in source and shipped to every deployment. Anyone who can reach Dinky's HTTP port (8888 by default) and supplies the hardcoded token can write arbitrary files as the Dinky service account. The default Docker image runs on 8888 with no proxy or authentication and chmod 777 on /opt/dinky, so the application's own classpath, launch scripts, and static assets are writable. Demonstrated impact: overwriting /opt/dinky/config/static/index.html served attacker JavaScript to admin browsers immediately, and writing /opt/dinky/org/dinky/Dinky.class executed attacker code as the Dinky service account at the next JVM start via a classpath-shadow launched by script/bin/auto.sh. Writes are uid 9999 (flink), not root, so /etc, /root, /home, and /usr are refused. Affects Dinky v1.2.5 (the current release) and the development branch, where the code is byte-identical.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

[Security] Unauthenticated arbitrary file write via POST /download/uploadFromRsByLocal (DownloadController.uploadFromRs) leading to code execution — v1.2.5 and dev branch, CVSS 9.8 · Issue #4566 · DataLinkDC/dinky · GitHub

https://github.com/DataLinkDC/dinky/issues/4566
generic

GitHub - DataLinkDC/dinky: Dinky is a real-time data development platform based on Apache Flink, enabling agile data development, deployment and operation. · GitHub

https://github.com/DataLinkDC/dinky

Vendor Advisories for CVE-2026-70558(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 54× in last 7d / 114× 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 114 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70558?
CVE-2026-70558 is a critical vulnerability published on August 6, 2026. Dinky's POST /download/uploadFromRsByLocal handler passes the caller-supplied path parameter directly to new File(path) and file.transferTo(dest) with no path validation. The route is marked @SaIgnore and /download/ is excluded from the Sa-Token interceptor, so the only guard is a header equality…
When was CVE-2026-70558 disclosed?
CVE-2026-70558 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70558 actively exploited?
CVE-2026-70558 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.0% of all scored CVEs.
What is the CVSS score of CVE-2026-70558?
CVE-2026-70558 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-70558?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70558, 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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