Medium severity5.3NVD Advisory· Published Nov 2, 2020· Updated Jun 17, 2026
CVE-2020-26939
CVE-2020-26939
Description
In Legion of the Bouncy Castle BC before 1.61 and BC-FJA before 1.0.1.2, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that decrypts to a short payload in the OAEP Decoder could result in the throwing of an early exception, potentially leaking some information about the private exponent of the RSA private key performing the encryption.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.bouncycastle:bcprov-jdk14Maven | < 1.61 | 1.61 |
org.bouncycastle:bcprov-jdk15Maven | < 1.61 | 1.61 |
org.bouncycastle:bcprov-jdk16Maven | < 1.61 | 1.61 |
org.bouncycastle:bc-fipsMaven | < 1.0.2 | 1.0.2 |
org.bouncycastle:bcprov-ext-jdk15onMaven | < 1.61 | 1.61 |
org.bouncycastle:bcprov-ext-jdk16Maven | < 1.61 | 1.61 |
org.bouncycastle:bcprov-jdk15onMaven | < 1.61 | 1.61 |
org.bouncycastle:bcprov-jdk15to18Maven | < 1.61 | 1.61 |
Affected products
9- Legion of the Bouncy Castle/BCdescription
- ghsa-coords8 versionspkg:maven/org.bouncycastle/bc-fipspkg:maven/org.bouncycastle/bcprov-ext-jdk15onpkg:maven/org.bouncycastle/bcprov-ext-jdk16pkg:maven/org.bouncycastle/bcprov-jdk14pkg:maven/org.bouncycastle/bcprov-jdk15pkg:maven/org.bouncycastle/bcprov-jdk15onpkg:maven/org.bouncycastle/bcprov-jdk15to18pkg:maven/org.bouncycastle/bcprov-jdk16
< 1.0.2+ 7 more
- (no CPE)range: < 1.0.2
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
- (no CPE)range: < 1.61
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-72m5-fvvv-55m6ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-26939ghsaADVISORY
- github.com/bcgit/bc-java/commit/930f8b274c4f1f3a46e68b5441f1e7fadb57e8c1ghsaWEB
- lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3EnvdWEB
- lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e@%3Cissues.solr.apache.org%3EghsaWEB
- lists.debian.org/debian-lts-announce/2020/11/msg00007.htmlghsaWEB
- security.netapp.com/advisory/ntap-20201202-0005ghsaWEB
News mentions
0No linked articles in our index yet.