CVE-2026-89086
Quick assessment
Affected
OCaml jose
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 0.11.0 版本之前的 OCaml 包中，库中用于验证 RSA 签名的函数仅确认 PKCS #1 解码成功，随后便直接判定签名为有效，却未执行涉及公钥的必要验证步骤。
Possible ATT&CK Techniques 1 AI
T1059.005 · Visual Basic
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I. Basic Information for CVE-2026-89086
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-89086
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2026-89086 (1)
Vendor Advisories for CVE-2026-89086 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-89086
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