CVE-2026-49818

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

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

The Apache Airflow Samba provider's GCSToSambaOperator joined GCS object names to the SMB destination path without a containment check, so an object named with ../ segments resolved a write path outside the configured destination_path. An attacker able to write objects into the source GCS bucket — typically an external data producer distinct from the trusted DAG author — could write files to arbitrary locations on the Samba target when the operator ran. Upgrade apache-airflow-providers-samba to 4.12.6 or later, which validates the resolved destination stays within destination_path.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
49.2%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

oss-security - CVE-2026-49818: Apache Airflow Samba provider: Path traversal in GCSToSambaOperator via GCS object names

http://www.openwall.com/lists/oss-security/2026/06/09/8
generic
https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf
github_pr

Validate GCSToSambaOperator destination path stays within destination_path

Fix merged in apache/airflow PR #67857 on 2026-06-02 — awaiting tagged release

https://github.com/apache/airflow/pull/67857

Vendor Advisories for CVE-2026-49818(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
apache-airflow-providers-samba1.0.0 ... 4.9.2rc1 (78 versions)4.12.6—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 51× 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.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:18 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:29 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:03 UTCEPSS rescore
  11. 2026-07-15 20:19 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-14 02:28 UTCGHSA enrichment
  16. 2026-07-13 22:30 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-12 05:46 UTCEPSS rescore
  19. 2026-07-11 22:30 UTCGHSA enrichment
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-10 21:09 UTCGHSA enrichment
  22. 2026-07-09 19:10 UTCEPSS rescore
  23. 2026-07-09 03:41 UTCGHSA enrichment
  24. 2026-07-08 15:16 UTCEPSS rescore
  25. 2026-07-08 02:01 UTCGHSA enrichment
Show 68 more
  1. 2026-07-07 13:46 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 15:49 UTCGHSA enrichment
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 14:27 UTCGHSA enrichment
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-03 01:39 UTCGHSA enrichment
  9. 2026-07-01 23:41 UTCGHSA enrichment
  10. 2026-07-01 15:07 UTCEPSS rescore
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 22:16 UTCGHSA enrichment
  13. 2026-06-29 20:56 UTCGHSA enrichment
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-28 19:36 UTCGHSA enrichment
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-27 18:14 UTCGHSA enrichment
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-26 16:53 UTCGHSA enrichment
  23. 2026-06-25 15:34 UTCGHSA enrichment
  24. 2026-06-25 13:49 UTCEPSS rescore
  25. 2026-06-24 14:07 UTCGHSA enrichment
  26. 2026-06-24 14:05 UTCEPSS rescore
  27. 2026-06-23 21:33 UTCEPSS rescore
  28. 2026-06-23 21:33 UTCEPSS rescore
  29. 2026-06-23 12:14 UTCGHSA enrichment
  30. 2026-06-22 14:25 UTCEPSS rescore
  31. 2026-06-22 14:25 UTCEPSS rescore
  32. 2026-06-22 05:24 UTCGHSA enrichment
  33. 2026-06-21 14:56 UTCEPSS rescore
  34. 2026-06-21 14:56 UTCEPSS rescore
  35. 2026-06-21 01:59 UTCEPSS rescore
  36. 2026-06-21 01:59 UTCEPSS rescore
  37. 2026-06-21 01:55 UTCGHSA enrichment
  38. 2026-06-19 23:02 UTCGHSA enrichment
  39. 2026-06-19 19:26 UTCEPSS rescore
  40. 2026-06-19 19:26 UTCEPSS rescore
  41. 2026-06-18 19:25 UTCGHSA enrichment
  42. 2026-06-18 17:52 UTCEPSS rescore
  43. 2026-06-18 17:52 UTCEPSS rescore
  44. 2026-06-17 17:53 UTCEPSS rescore
  45. 2026-06-17 15:44 UTCGHSA enrichment
  46. 2026-06-16 17:53 UTCEPSS rescore
  47. 2026-06-16 14:21 UTCGHSA enrichment
  48. 2026-06-15 17:49 UTCEPSS rescore
  49. 2026-06-15 17:49 UTCEPSS rescore
  50. 2026-06-15 13:01 UTCGHSA enrichment
  51. 2026-06-14 23:18 UTCEPSS rescore
  52. 2026-06-14 11:39 UTCGHSA enrichment
  53. 2026-06-13 23:00 UTCEPSS rescore
  54. 2026-06-13 10:19 UTCGHSA enrichment
  55. 2026-06-12 23:12 UTCEPSS rescore
  56. 2026-06-12 23:12 UTCEPSS rescore
  57. 2026-06-12 08:58 UTCEG score recompute▲ 6.50
  58. 2026-06-12 08:58 UTCGHSA enrichment
  59. 2026-06-11 14:00 UTCEPSS rescore
  60. 2026-06-10 22:19 UTCEPSS rescore
  61. 2026-06-10 13:22 UTCEPSS rescore
  62. 2026-06-10 13:22 UTCEPSS rescore
  63. 2026-06-09 16:22 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  64. 2026-06-09 11:31 UTCNVD update
  65. 2026-06-09 11:19 UTCMITRE cvelistV5
  66. 2026-06-09 09:35 UTCNVD update
  67. 2026-06-09 08:46 UTCEG score recompute
  68. 2026-06-09 08:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49818?
CVE-2026-49818 is a medium vulnerability published on June 9, 2026. The Apache Airflow Samba provider's GCSToSambaOperator joined GCS object names to the SMB destination path without a containment check, so an object named with ../ segments resolved a write path outside the configured destinationpath. An attacker able to write objects into the source GCS bucket —…
When was CVE-2026-49818 disclosed?
CVE-2026-49818 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49818 actively exploited?
CVE-2026-49818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49818?
CVE-2026-49818 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-49818?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49818, 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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