CVE-2025-15224Public exploitNetwork attack vector

Unintended SSH authentication via implicit agent fallback

Published Jan 8, 2026 · Updated Jan 8, 2026

Improper authentication in curl 7.58.0 through 8.17.0 allows remote attackers to trigger unintended SSH-agent authentication. In lib/vssh/libssh.c, myssh_in_AUTHLIST enters public-key authentication without requiring an explicitly selected private key or agent, allowing libssh to fall back to the local SSH agent. Reachability requires an SCP or SFTP transfer, a libssh-backed build, user interaction, and an agent holding a credential accepted by the remote server.

CVSS severity3.1
Low
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in curl 7.58.0 through 8.17.0 allows remote attackers to trigger unintended SSH-agent authentication. In lib/vssh/libssh.c, myssh_in_AUTHLIST enters public-key authentication without requiring an explicitly selected private key or agent, allowing libssh to fall back to the local SSH agent. Reachability requires an SCP or SFTP transfer, a libssh-backed build, user interaction, and an agent holding a credential accepted by the remote server.

The record

CVE
CVE-2025-15224
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
curl
Product
curl
Classifications
CWE-287
Attack vector
network
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

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Is a vulnerable build present?

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

  1. Affected versionversion=7.58.0 <=7.58.0
  2. Affected versionversion=7.59.0 <=7.59.0
  3. Affected versionversion=7.60.0 <=7.60.0
  4. Affected versionversion=7.61.0 <=7.61.0
  5. Affected versionversion=7.61.1 <=7.61.1
  6. Affected versionversion=7.62.0 <=7.62.0
  7. Affected versionversion=7.63.0 <=7.63.0
  8. Affected versionversion=7.64.0 <=7.64.0
  9. Affected versionversion=7.64.1 <=7.64.1
  10. Affected versionversion=7.65.0 <=7.65.0
  11. Affected versionversion=7.65.1 <=7.65.1
  12. Affected versionversion=7.65.2 <=7.65.2
  13. Affected versionversion=7.65.3 <=7.65.3
  14. Affected versionversion=7.66.0 <=7.66.0
  15. Affected versionversion=7.67.0 <=7.67.0
  16. Affected versionversion=7.68.0 <=7.68.0
  17. Affected versionversion=7.69.0 <=7.69.0
  18. Affected versionversion=7.69.1 <=7.69.1
  19. Affected versionversion=7.70.0 <=7.70.0
  20. Affected versionversion=7.71.0 <=7.71.0
  21. Affected versionversion=7.71.1 <=7.71.1
  22. Affected versionversion=7.72.0 <=7.72.0
  23. Affected versionversion=7.73.0 <=7.73.0
  24. Affected versionversion=7.74.0 <=7.74.0
  25. Affected versionversion=7.75.0 <=7.75.0
  26. Affected versionversion=7.76.0 <=7.76.0
  27. Affected versionversion=7.76.1 <=7.76.1
  28. Affected versionversion=7.77.0 <=7.77.0
  29. Affected versionversion=7.78.0 <=7.78.0
  30. Affected versionversion=7.79.0 <=7.79.0
  31. Affected versionversion=7.79.1 <=7.79.1
  32. Affected versionversion=7.80.0 <=7.80.0
  33. Affected versionversion=7.81.0 <=7.81.0
  34. Affected versionversion=7.82.0 <=7.82.0
  35. Affected versionversion=7.83.0 <=7.83.0
  36. Affected versionversion=7.83.1 <=7.83.1
  37. Affected versionversion=7.84.0 <=7.84.0
  38. Affected versionversion=7.85.0 <=7.85.0
  39. Affected versionversion=7.86.0 <=7.86.0
  40. Affected versionversion=7.87.0 <=7.87.0
  41. Affected versionversion=7.88.0 <=7.88.0
  42. Affected versionversion=7.88.1 <=7.88.1
  43. Affected versionversion=8.0.0 <=8.0.0
  44. Affected versionversion=8.0.1 <=8.0.1
  45. Affected versionversion=8.10.0 <=8.10.0
  46. Affected versionversion=8.10.1 <=8.10.1
  47. Affected versionversion=8.1.0 <=8.1.0
  48. Affected versionversion=8.11.0 <=8.11.0
  49. Affected versionversion=8.11.1 <=8.11.1
  50. Affected versionversion=8.1.1 <=8.1.1
  51. Affected versionversion=8.12.0 <=8.12.0
  52. Affected versionversion=8.12.1 <=8.12.1
  53. Affected versionversion=8.1.2 <=8.1.2
  54. Affected versionversion=8.13.0 <=8.13.0
  55. Affected versionversion=8.14.0 <=8.14.0
  56. Affected versionversion=8.14.1 <=8.14.1
  57. Affected versionversion=8.15.0 <=8.15.0
  58. Affected versionversion=8.16.0 <=8.16.0
  59. Affected versionversion=8.17.0 <=8.17.0
  60. Affected versionversion=8.2.0 <=8.2.0
  61. Affected versionversion=8.2.1 <=8.2.1
  62. Affected versionversion=8.3.0 <=8.3.0
  63. Affected versionversion=8.4.0 <=8.4.0
  64. Affected versionversion=8.5.0 <=8.5.0
  65. Affected versionversion=8.6.0 <=8.6.0
  66. Affected versionversion=8.7.0 <=8.7.0
  67. Affected versionversion=8.7.1 <=8.7.1
  68. Affected versionversion=8.8.0 <=8.8.0
  69. Affected versionversion=8.9.0 <=8.9.0
  70. Affected versionversion=8.9.1 <=8.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

curl · curlversion=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

3.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/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-287Improper Authentication

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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