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 70% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.6%
EPSS %ILE
49th
KEV
Not listed

Published

June 15, 2026

Last Modified

August 4, 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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
starlette0.1.0 ... 1.0.1 (192 versions)
  • every version up to 1.1.0: fixed in 1.1.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 22× 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 214 total refreshes for this CVE.

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

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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 on June 15, 2026, with the most recent update on August 4, 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 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48818?
CVE-2026-48818 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48818?
A fix for CVE-2026-48818 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48818 are linked in the Vendor Advisories panel on this page.

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