CVE-2026-16653Public exploitNetwork attack vector

Unauthenticated file disclosure via leading path traversal

Published Jul 23, 2026 · Updated Jul 23, 2026

Path traversal in facil.io 0.7.58 and earlier allows remote attackers to read files outside the public folder via crafted HTTP paths. The http_sendfile2 function concatenates public_folder with the request target, and http_test_encoded_path fails to reject a leading ../ sequence. The flaw is reachable only when public_folder is enabled, and exposure is limited to files readable by the server process.

CVSS severity6.9
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in facil.io 0.7.58 and earlier allows remote attackers to read files outside the public folder via crafted HTTP paths. The http_sendfile2 function concatenates public_folder with the request target, and http_test_encoded_path fails to reject a leading ../ sequence. The flaw is reachable only when public_folder is enabled, and exposure is limited to files readable by the server process.

The record

CVE
CVE-2026-16653
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
Boaz Segev
Product
facil.io
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.7.0
  2. Affected versionversion=0.7.1
  3. Affected versionversion=0.7.10
  4. Affected versionversion=0.7.11
  5. Affected versionversion=0.7.12
  6. Affected versionversion=0.7.13
  7. Affected versionversion=0.7.14
  8. Affected versionversion=0.7.15
  9. Affected versionversion=0.7.16
  10. Affected versionversion=0.7.17
  11. Affected versionversion=0.7.18
  12. Affected versionversion=0.7.19
  13. Affected versionversion=0.7.2
  14. Affected versionversion=0.7.20
  15. Affected versionversion=0.7.21
  16. Affected versionversion=0.7.22
  17. Affected versionversion=0.7.23
  18. Affected versionversion=0.7.24
  19. Affected versionversion=0.7.25
  20. Affected versionversion=0.7.26
  21. Affected versionversion=0.7.27
  22. Affected versionversion=0.7.28
  23. Affected versionversion=0.7.29
  24. Affected versionversion=0.7.3
  25. Affected versionversion=0.7.30
  26. Affected versionversion=0.7.31
  27. Affected versionversion=0.7.32
  28. Affected versionversion=0.7.33
  29. Affected versionversion=0.7.34
  30. Affected versionversion=0.7.35
  31. Affected versionversion=0.7.36
  32. Affected versionversion=0.7.37
  33. Affected versionversion=0.7.38
  34. Affected versionversion=0.7.39
  35. Affected versionversion=0.7.4
  36. Affected versionversion=0.7.40
  37. Affected versionversion=0.7.41
  38. Affected versionversion=0.7.42
  39. Affected versionversion=0.7.43
  40. Affected versionversion=0.7.44
  41. Affected versionversion=0.7.45
  42. Affected versionversion=0.7.46
  43. Affected versionversion=0.7.47
  44. Affected versionversion=0.7.48
  45. Affected versionversion=0.7.49
  46. Affected versionversion=0.7.5
  47. Affected versionversion=0.7.50
  48. Affected versionversion=0.7.51
  49. Affected versionversion=0.7.52
  50. Affected versionversion=0.7.53
  51. Affected versionversion=0.7.54
  52. Affected versionversion=0.7.55
  53. Affected versionversion=0.7.56
  54. Affected versionversion=0.7.57
  55. Affected versionversion=0.7.58
  56. Affected versionversion=0.7.6
  57. Affected versionversion=0.7.7
  58. Affected versionversion=0.7.8
  59. Affected versionversion=0.7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Boaz Segev · facil.ioversion=0.7.0; version=0.7.1; version=0.7.10; version=0.7.11; version=0.7.12; version=0.7.13; version=0.7.14; version=0.7.15; version=0.7.16; version=0.7.17; version=0.7.18; version=0.7.19; version=0.7.2; version=0.7.20; version=0.7.21; version=0.7.22; version=0.7.23; version=0.7.24; version=0.7.25; version=0.7.26; version=0.7.27; version=0.7.28; version=0.7.29; version=0.7.3; version=0.7.30; version=0.7.31; version=0.7.32; version=0.7.33; version=0.7.34; version=0.7.35; version=0.7.36; version=0.7.37; version=0.7.38; version=0.7.39; version=0.7.4; version=0.7.40; version=0.7.41; version=0.7.42; version=0.7.43; version=0.7.44; version=0.7.45; version=0.7.46; version=0.7.47; version=0.7.48; version=0.7.49; version=0.7.5; version=0.7.50; version=0.7.51; version=0.7.52; version=0.7.53; version=0.7.54; version=0.7.55; version=0.7.56; version=0.7.57; version=0.7.58; version=0.7.6; version=0.7.7; version=0.7.8; version=0.7.9

Published CVSS scores

5.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
6.9VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.0VulDB CNAAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Path Traversal
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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