CVE-2026-87735 Details
Description
An issue was discovered in the mirage-crypto-pk package before 2.3.0 for OCaml. There is an undocumented exception for a small message during RSA decryption or encryption.
A vulnerability exists in the mirage-crypto-pk package for OCaml, affecting versions prior to 2.3.0. The issue arises during RSA encryption and decryption, where messages smaller than 2 inadvertently trigger an Invalid_argument exception. This flaw disrupts the handling of X509 certificates with signature values of 0 or 1, causing them to generate this exception instead of a more appropriate error.
Users can upgrade to mirage-crypto-pk version 2.3.0 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2026CISA-ADP
Assessed Sep 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://osv.dev/vulnerability/OSEC-2026-14 | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1284 | Improper Validation of Specified Quantity in Input | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mirage-crypto-pk | < 2.3.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 9, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2026 | New CVE Received | [email protected] |