CVE-2025-14017Hinoki check available

TLS certificate verification bypass via global LDAP options

Published Jan 8, 2026 · Updated Jan 8, 2026

TLS certificate-verification bypass in curl libcurl 7.17.0 through 8.17.0 allows attackers to weaken concurrent LDAPS transfers. In lib/ldap.c, ldap_do sets certificate and protocol options through a null LDAP handle before initializing a connection, changing process-global state shared by other threads. Exploitation requires a legacy non-Windows LDAP build, simultaneous threaded transfers, one transfer disabling verification, and a timing race; OpenLDAP, WinLDAP, and the curl command-line tool are unaffected.

CVSS severity6.3
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

TLS certificate-verification bypass in curl libcurl 7.17.0 through 8.17.0 allows attackers to weaken concurrent LDAPS transfers. In lib/ldap.c, ldap_do sets certificate and protocol options through a null LDAP handle before initializing a connection, changing process-global state shared by other threads. Exploitation requires a legacy non-Windows LDAP build, simultaneous threaded transfers, one transfer disabling verification, and a timing race; OpenLDAP, WinLDAP, and the curl command-line tool are unaffected.

The record

CVE
CVE-2025-14017
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
curl
Product
curl
Classifications
CWE-567, T1557
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 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=7.17.0 <=7.17.0
  2. Affected versionversion=7.17.1 <=7.17.1
  3. Affected versionversion=7.18.0 <=7.18.0
  4. Affected versionversion=7.18.1 <=7.18.1
  5. Affected versionversion=7.18.2 <=7.18.2
  6. Affected versionversion=7.19.0 <=7.19.0
  7. Affected versionversion=7.19.1 <=7.19.1
  8. Affected versionversion=7.19.2 <=7.19.2
  9. Affected versionversion=7.19.3 <=7.19.3
  10. Affected versionversion=7.19.4 <=7.19.4
  11. Affected versionversion=7.19.5 <=7.19.5
  12. Affected versionversion=7.19.6 <=7.19.6
  13. Affected versionversion=7.19.7 <=7.19.7
  14. Affected versionversion=7.20.0 <=7.20.0
  15. Affected versionversion=7.20.1 <=7.20.1
  16. Affected versionversion=7.21.0 <=7.21.0
  17. Affected versionversion=7.21.1 <=7.21.1
  18. Affected versionversion=7.21.2 <=7.21.2
  19. Affected versionversion=7.21.3 <=7.21.3
  20. Affected versionversion=7.21.4 <=7.21.4
  21. Affected versionversion=7.21.5 <=7.21.5
  22. Affected versionversion=7.21.6 <=7.21.6
  23. Affected versionversion=7.21.7 <=7.21.7
  24. Affected versionversion=7.22.0 <=7.22.0
  25. Affected versionversion=7.23.0 <=7.23.0
  26. Affected versionversion=7.23.1 <=7.23.1
  27. Affected versionversion=7.24.0 <=7.24.0
  28. Affected versionversion=7.25.0 <=7.25.0
  29. Affected versionversion=7.26.0 <=7.26.0
  30. Affected versionversion=7.27.0 <=7.27.0
  31. Affected versionversion=7.28.0 <=7.28.0
  32. Affected versionversion=7.28.1 <=7.28.1
  33. Affected versionversion=7.29.0 <=7.29.0
  34. Affected versionversion=7.30.0 <=7.30.0
  35. Affected versionversion=7.31.0 <=7.31.0
  36. Affected versionversion=7.32.0 <=7.32.0
  37. Affected versionversion=7.33.0 <=7.33.0
  38. Affected versionversion=7.34.0 <=7.34.0
  39. Affected versionversion=7.35.0 <=7.35.0
  40. Affected versionversion=7.36.0 <=7.36.0
  41. Affected versionversion=7.37.0 <=7.37.0
  42. Affected versionversion=7.37.1 <=7.37.1
  43. Affected versionversion=7.38.0 <=7.38.0
  44. Affected versionversion=7.39.0 <=7.39.0
  45. Affected versionversion=7.40.0 <=7.40.0
  46. Affected versionversion=7.41.0 <=7.41.0
  47. Affected versionversion=7.42.0 <=7.42.0
  48. Affected versionversion=7.42.1 <=7.42.1
  49. Affected versionversion=7.43.0 <=7.43.0
  50. Affected versionversion=7.44.0 <=7.44.0
  51. Affected versionversion=7.45.0 <=7.45.0
  52. Affected versionversion=7.46.0 <=7.46.0
  53. Affected versionversion=7.47.0 <=7.47.0
  54. Affected versionversion=7.47.1 <=7.47.1
  55. Affected versionversion=7.48.0 <=7.48.0
  56. Affected versionversion=7.49.0 <=7.49.0
  57. Affected versionversion=7.49.1 <=7.49.1
  58. Affected versionversion=7.50.0 <=7.50.0
  59. Affected versionversion=7.50.1 <=7.50.1
  60. Affected versionversion=7.50.2 <=7.50.2
  61. Affected versionversion=7.50.3 <=7.50.3
  62. Affected versionversion=7.51.0 <=7.51.0
  63. Affected versionversion=7.52.0 <=7.52.0
  64. Affected versionversion=7.52.1 <=7.52.1
  65. Affected versionversion=7.53.0 <=7.53.0
  66. Affected versionversion=7.53.1 <=7.53.1
  67. Affected versionversion=7.54.0 <=7.54.0
  68. Affected versionversion=7.54.1 <=7.54.1
  69. Affected versionversion=7.55.0 <=7.55.0
  70. Affected versionversion=7.55.1 <=7.55.1
  71. Affected versionversion=7.56.0 <=7.56.0
  72. Affected versionversion=7.56.1 <=7.56.1
  73. Affected versionversion=7.57.0 <=7.57.0
  74. Affected versionversion=7.58.0 <=7.58.0
  75. Affected versionversion=7.59.0 <=7.59.0
  76. Affected versionversion=7.60.0 <=7.60.0
  77. Affected versionversion=7.61.0 <=7.61.0
  78. Affected versionversion=7.61.1 <=7.61.1
  79. Affected versionversion=7.62.0 <=7.62.0
  80. Affected versionversion=7.63.0 <=7.63.0
  81. Affected versionversion=7.64.0 <=7.64.0
  82. Affected versionversion=7.64.1 <=7.64.1
  83. Affected versionversion=7.65.0 <=7.65.0
  84. Affected versionversion=7.65.1 <=7.65.1
  85. Affected versionversion=7.65.2 <=7.65.2
  86. Affected versionversion=7.65.3 <=7.65.3
  87. Affected versionversion=7.66.0 <=7.66.0
  88. Affected versionversion=7.67.0 <=7.67.0
  89. Affected versionversion=7.68.0 <=7.68.0
  90. Affected versionversion=7.69.0 <=7.69.0
  91. Affected versionversion=7.69.1 <=7.69.1
  92. Affected versionversion=7.70.0 <=7.70.0
  93. Affected versionversion=7.71.0 <=7.71.0
  94. Affected versionversion=7.71.1 <=7.71.1
  95. Affected versionversion=7.72.0 <=7.72.0
  96. Affected versionversion=7.73.0 <=7.73.0
  97. Affected versionversion=7.74.0 <=7.74.0
  98. Affected versionversion=7.75.0 <=7.75.0
  99. Affected versionversion=7.76.0 <=7.76.0
  100. Affected versionversion=7.76.1 <=7.76.1
  101. Affected versionversion=7.77.0 <=7.77.0
  102. Affected versionversion=7.78.0 <=7.78.0
  103. Affected versionversion=7.79.0 <=7.79.0
  104. Affected versionversion=7.79.1 <=7.79.1
  105. Affected versionversion=7.80.0 <=7.80.0
  106. Affected versionversion=7.81.0 <=7.81.0
  107. Affected versionversion=7.82.0 <=7.82.0
  108. Affected versionversion=7.83.0 <=7.83.0
  109. Affected versionversion=7.83.1 <=7.83.1
  110. Affected versionversion=7.84.0 <=7.84.0
  111. Affected versionversion=7.85.0 <=7.85.0
  112. Affected versionversion=7.86.0 <=7.86.0
  113. Affected versionversion=7.87.0 <=7.87.0
  114. Affected versionversion=7.88.0 <=7.88.0
  115. Affected versionversion=7.88.1 <=7.88.1
  116. Affected versionversion=8.0.0 <=8.0.0
  117. Affected versionversion=8.0.1 <=8.0.1
  118. Affected versionversion=8.10.0 <=8.10.0
  119. Affected versionversion=8.10.1 <=8.10.1
  120. Affected versionversion=8.1.0 <=8.1.0
  121. Affected versionversion=8.11.0 <=8.11.0
  122. Affected versionversion=8.11.1 <=8.11.1
  123. Affected versionversion=8.1.1 <=8.1.1
  124. Affected versionversion=8.12.0 <=8.12.0
  125. Affected versionversion=8.12.1 <=8.12.1
  126. Affected versionversion=8.1.2 <=8.1.2
  127. Affected versionversion=8.13.0 <=8.13.0
  128. Affected versionversion=8.14.0 <=8.14.0
  129. Affected versionversion=8.14.1 <=8.14.1
  130. Affected versionversion=8.15.0 <=8.15.0
  131. Affected versionversion=8.16.0 <=8.16.0
  132. Affected versionversion=8.17.0 <=8.17.0
  133. Affected versionversion=8.2.0 <=8.2.0
  134. Affected versionversion=8.2.1 <=8.2.1
  135. Affected versionversion=8.3.0 <=8.3.0
  136. Affected versionversion=8.4.0 <=8.4.0
  137. Affected versionversion=8.5.0 <=8.5.0
  138. Affected versionversion=8.6.0 <=8.6.0
  139. Affected versionversion=8.7.0 <=8.7.0
  140. Affected versionversion=8.7.1 <=8.7.1
  141. Affected versionversion=8.8.0 <=8.8.0
  142. Affected versionversion=8.9.0 <=8.9.0
  143. Affected versionversion=8.9.1 <=8.9.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

curl · curlversion=7.17.0 <=7.17.0; version=7.17.1 <=7.17.1; version=7.18.0 <=7.18.0; version=7.18.1 <=7.18.1; version=7.18.2 <=7.18.2; version=7.19.0 <=7.19.0; version=7.19.1 <=7.19.1; version=7.19.2 <=7.19.2; version=7.19.3 <=7.19.3; version=7.19.4 <=7.19.4; version=7.19.5 <=7.19.5; version=7.19.6 <=7.19.6; version=7.19.7 <=7.19.7; version=7.20.0 <=7.20.0; version=7.20.1 <=7.20.1; version=7.21.0 <=7.21.0; version=7.21.1 <=7.21.1; version=7.21.2 <=7.21.2; version=7.21.3 <=7.21.3; version=7.21.4 <=7.21.4; version=7.21.5 <=7.21.5; version=7.21.6 <=7.21.6; version=7.21.7 <=7.21.7; version=7.22.0 <=7.22.0; version=7.23.0 <=7.23.0; version=7.23.1 <=7.23.1; version=7.24.0 <=7.24.0; version=7.25.0 <=7.25.0; version=7.26.0 <=7.26.0; version=7.27.0 <=7.27.0; version=7.28.0 <=7.28.0; version=7.28.1 <=7.28.1; version=7.29.0 <=7.29.0; version=7.30.0 <=7.30.0; version=7.31.0 <=7.31.0; version=7.32.0 <=7.32.0; version=7.33.0 <=7.33.0; version=7.34.0 <=7.34.0; version=7.35.0 <=7.35.0; version=7.36.0 <=7.36.0; version=7.37.0 <=7.37.0; version=7.37.1 <=7.37.1; version=7.38.0 <=7.38.0; version=7.39.0 <=7.39.0; version=7.40.0 <=7.40.0; version=7.41.0 <=7.41.0; version=7.42.0 <=7.42.0; version=7.42.1 <=7.42.1; version=7.43.0 <=7.43.0; version=7.44.0 <=7.44.0; version=7.45.0 <=7.45.0; version=7.46.0 <=7.46.0; version=7.47.0 <=7.47.0; version=7.47.1 <=7.47.1; version=7.48.0 <=7.48.0; version=7.49.0 <=7.49.0; version=7.49.1 <=7.49.1; version=7.50.0 <=7.50.0; version=7.50.1 <=7.50.1; version=7.50.2 <=7.50.2; version=7.50.3 <=7.50.3; version=7.51.0 <=7.51.0; version=7.52.0 <=7.52.0; version=7.52.1 <=7.52.1; version=7.53.0 <=7.53.0; version=7.53.1 <=7.53.1; version=7.54.0 <=7.54.0; version=7.54.1 <=7.54.1; version=7.55.0 <=7.55.0; version=7.55.1 <=7.55.1; version=7.56.0 <=7.56.0; version=7.56.1 <=7.56.1; version=7.57.0 <=7.57.0; version=7.58.0 <=7.58.0; version=7.59.0 <=7.59.0; version=7.60.0 <=7.60.0; version=7.61.0 <=7.61.0; version=7.61.1 <=7.61.1; version=7.62.0 <=7.62.0; version=7.63.0 <=7.63.0; version=7.64.0 <=7.64.0; version=7.64.1 <=7.64.1; version=7.65.0 <=7.65.0; version=7.65.1 <=7.65.1; version=7.65.2 <=7.65.2; version=7.65.3 <=7.65.3; version=7.66.0 <=7.66.0; version=7.67.0 <=7.67.0; version=7.68.0 <=7.68.0; version=7.69.0 <=7.69.0; version=7.69.1 <=7.69.1; version=7.70.0 <=7.70.0; version=7.71.0 <=7.71.0; version=7.71.1 <=7.71.1; version=7.72.0 <=7.72.0; version=7.73.0 <=7.73.0; version=7.74.0 <=7.74.0; version=7.75.0 <=7.75.0; version=7.76.0 <=7.76.0; version=7.76.1 <=7.76.1; version=7.77.0 <=7.77.0; version=7.78.0 <=7.78.0; version=7.79.0 <=7.79.0; version=7.79.1 <=7.79.1; version=7.80.0 <=7.80.0; version=7.81.0 <=7.81.0; version=7.82.0 <=7.82.0; version=7.83.0 <=7.83.0; version=7.83.1 <=7.83.1; version=7.84.0 <=7.84.0; version=7.85.0 <=7.85.0; version=7.86.0 <=7.86.0; version=7.87.0 <=7.87.0; version=7.88.0 <=7.88.0; version=7.88.1 <=7.88.1; version=8.0.0 <=8.0.0; version=8.0.1 <=8.0.1; version=8.10.0 <=8.10.0; version=8.10.1 <=8.10.1; version=8.1.0 <=8.1.0; version=8.11.0 <=8.11.0; version=8.11.1 <=8.11.1; version=8.1.1 <=8.1.1; version=8.12.0 <=8.12.0; version=8.12.1 <=8.12.1; version=8.1.2 <=8.1.2; version=8.13.0 <=8.13.0; version=8.14.0 <=8.14.0; version=8.14.1 <=8.14.1; version=8.15.0 <=8.15.0; version=8.16.0 <=8.16.0; version=8.17.0 <=8.17.0; version=8.2.0 <=8.2.0; version=8.2.1 <=8.2.1; version=8.3.0 <=8.3.0; version=8.4.0 <=8.4.0; version=8.5.0 <=8.5.0; version=8.6.0 <=8.6.0; version=8.7.0 <=8.7.0; version=8.7.1 <=8.7.1; version=8.8.0 <=8.8.0; version=8.9.0 <=8.9.0; version=8.9.1 <=8.9.1

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-567Unsynchronized Access to Shared Data in a Multi-threaded Context
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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