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Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15

Moderate severity GitHub Reviewed Published Oct 17, 2018 to the GitHub Advisory Database • Updated Sep 12, 2025

Package

maven org.bouncycastle:bcprov-jdk14 (Maven)

Affected versions

< 1.51

Patched versions

1.51
maven org.bouncycastle:bcprov-jdk15 (Maven)
< 1.51
1.51
maven org.bouncycastle:bcprov-jdk15on (Maven)
< 1.51
1.51

Description

The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an "invalid curve attack."

References

Published by the National Vulnerability Database Nov 9, 2015
Published to the GitHub Advisory Database Oct 17, 2018
Reviewed Jun 16, 2020
Last updated Sep 12, 2025

Severity

Moderate

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(77th percentile)

Weaknesses

Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Learn more on MITRE.

CVE ID

CVE-2015-7940

GHSA ID

GHSA-4mv7-cq75-3qjm

Source code

No known source code
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