CVE-2026-48818

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
29.3%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jun 17, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows · Advisory · Kludex/starlette · GitHub

https://github.com/Kludex/starlette/security/advisories/GHSA-wqp7-x3pw-xc5r
github_release Patch Available

Version 1.1.0

Patch available: Kludex/starlette 1.1.0

https://github.com/Kludex/starlette/releases/tag/1.1.0
github_pr Patch Available

Reject absolute paths in `StaticFiles.lookup_path`

Patch available: Kludex/starlette 1.1.0 (PR #3287 merged 2026-05-23)

https://github.com/Kludex/starlette/pull/3287
github_commit Patch Available

commit fd53168a7767 (Kludex/starlette)

Patch available: Kludex/starlette 1.1.0 (contains commit fd53168a7767)

https://github.com/Kludex/starlette/commit/fd53168a7767b6b55ba5af787fd88f49e33cabc5

Vendor Advisories for CVE-2026-48818(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhaiis/vllm-spyre-rhel9:17823529192026-06-25redhat
redhatrhaiis/vllm-rocm-rhel9:17823530932026-06-25redhat
redhatrhaiis/vllm-cuda-rhel9:17823528472026-06-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
starlette0.1.0 ... 1.0.1 (192 versions)1.1.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 63× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 02:29 UTCEPSS rescore
  5. 2026-07-18 10:04 UTCEPSS rescore
  6. 2026-07-16 22:55 UTCVendor advisory
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-16 04:36 UTCVendor advisory
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 15:46 UTCVendor advisory
  11. 2026-07-15 02:00 UTCEPSS rescore
  12. 2026-07-15 01:25 UTCVendor advisory
  13. 2026-07-14 10:17 UTCVendor advisory
  14. 2026-07-13 22:30 UTCEPSS rescore
  15. 2026-07-13 18:45 UTCVendor advisory
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-13 05:54 UTCVendor advisory
  18. 2026-07-12 15:47 UTCVendor advisory
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-12 01:06 UTCVendor advisory
  21. 2026-07-11 12:13 UTCVendor advisory
  22. 2026-07-11 08:27 UTCEPSS rescore
  23. 2026-07-10 23:23 UTCVendor advisory
  24. 2026-07-10 10:18 UTCVendor advisory
  25. 2026-07-09 21:00 UTCVendor advisory
Show 49 more
  1. 2026-07-09 19:10 UTCEPSS rescore
  2. 2026-07-09 03:37 UTCVendor advisory
  3. 2026-07-08 14:47 UTCVendor advisory
  4. 2026-07-08 01:57 UTCVendor advisory
  5. 2026-07-07 13:06 UTCVendor advisory
  6. 2026-07-07 00:16 UTCVendor advisory
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 00:35 UTCVendor advisory
  10. 2026-07-05 11:44 UTCVendor advisory
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 22:48 UTCVendor advisory
  13. 2026-07-04 09:58 UTCVendor advisory
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 14:15 UTCVendor advisory
  16. 2026-07-03 01:05 UTCVendor advisory
  17. 2026-07-02 12:15 UTCVendor advisory
  18. 2026-07-01 23:24 UTCVendor advisory
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 10:34 UTCVendor advisory
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 21:43 UTCVendor advisory
  23. 2026-06-30 08:53 UTCVendor advisory
  24. 2026-06-29 20:03 UTCVendor advisory
  25. 2026-06-29 14:06 UTCEPSS rescore
  26. 2026-06-29 14:06 UTCEPSS rescore
  27. 2026-06-29 07:13 UTCVendor advisory
  28. 2026-06-28 18:14 UTCVendor advisory
  29. 2026-06-28 14:07 UTCEPSS rescore
  30. 2026-06-28 05:22 UTCVendor advisory
  31. 2026-06-28 04:56 UTCEPSS rescore
  32. 2026-06-28 04:56 UTCEPSS rescore
  33. 2026-06-27 16:32 UTCVendor advisory
  34. 2026-06-27 03:08 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-24 14:05 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-23 21:33 UTCEPSS rescore
  39. 2026-06-22 14:25 UTCEPSS rescore
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-21 14:56 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-21 01:59 UTCEPSS rescore
  44. 2026-06-21 01:59 UTCEPSS rescore
  45. 2026-06-19 19:26 UTCEPSS rescore
  46. 2026-06-19 19:26 UTCEPSS rescore
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-15 20:46 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-48818?
CVE-2026-48818 is a high vulnerability published on June 15, 2026. Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s…
When was CVE-2026-48818 disclosed?
CVE-2026-48818 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48818 actively exploited?
CVE-2026-48818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48818?
CVE-2026-48818 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-48818?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48818, 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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