Summary
Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15
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."
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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org.bouncycastle:bcprov-jdk15 to 1.51 or later; org.bouncycastle:bcprov-jdk14 to 1.51 or later; org.bouncycastle:bcprov-jdk15on to 1.51 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2015-7940? CVE-2015-7940 is a medium-severity security vulnerability in org.bouncycastle:bcprov-jdk15 (maven), affecting versions < 1.51. It is fixed in 1.51.
- Which packages are affected by CVE-2015-7940?
org.bouncycastle:bcprov-jdk15(maven) (versions < 1.51)org.bouncycastle:bcprov-jdk14(maven) (versions < 1.51)org.bouncycastle:bcprov-jdk15on(maven) (versions < 1.51)
- Is there a fix for CVE-2015-7940? Yes. CVE-2015-7940 is fixed in 1.51. Upgrade to this version or later.
- Is CVE-2015-7940 exploitable, and should I be worried? Whether CVE-2015-7940 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2015-7940 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2015-7940?
- Upgrade
org.bouncycastle:bcprov-jdk15to 1.51 or later - Upgrade
org.bouncycastle:bcprov-jdk14to 1.51 or later - Upgrade
org.bouncycastle:bcprov-jdk15onto 1.51 or later
- Upgrade