cve.bz

CVE-2020-26939

5.3 mediumEPSS 0.9%

Medium (5.3) in bouncycastle. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in org.bouncycastle:bcprov-jdk14 1.61.

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.

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
CWE
CWE-203
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-jdk14<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-jdk15<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-jdk16<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bc-fips<1.0.21.0.2
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-ext-jdk15on<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-ext-jdk16<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-jdk15on<1.611.61
GHSA-72m5-fvvv-55m6Mavenorg.bouncycastle:bcprov-jdk15to18<1.611.61

References

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