Timing Attack Affecting org.bouncycastle:bcprov-jdk15to18 package, versions [1.73,1.86)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGBOUNCYCASTLE-20419435
- published4 Oct 2026
- disclosed2 Oct 2026
- creditPeter Schwabe, Yuval Yarom, Anirban Chakraborty, Matthew Roughan, Deepak Bhargavan Pillai, Chitchanok Chuengsatiansup
Introduced: 2 Oct 2026
NewCVE-2026-18036 (opens in a new tab)How to fix?
Upgrade org.bouncycastle:bcprov-jdk15to18 to version 1.86 or higher.
Overview
org.bouncycastle:bcprov-jdk15to18 is a Java implementation of cryptographic algorithms.
Affected versions of this package are vulnerable to Timing Attack through the mod3 and modQ reduction helpers in org.bouncycastle.pqc.math.ntru.Polynomial and org.bouncycastle.pqc.crypto.ntru.NTRUSampling. An attacker can recover information about NTRU private key material by measuring the latency of secret-dependent modular reductions during key generation, encapsulation, and decapsulation.