CVE-2020-26939 – org.bouncycastle:bcprov-ext-jdk16

Package

Manager: maven
Name: org.bouncycastle:bcprov-ext-jdk16
Vulnerable Version: >=0 <1.61

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.02351 pctl0.84302

Details

Observable Differences in Behavior to Error Inputs in Bouncy Castle In Legion of the Bouncy Castle BC before 1.55 and BC-FJA before 1.0.2, 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.

Metadata

Created: 2021-04-22T16:16:49Z
Modified: 2025-07-17T22:04:26Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-72m5-fvvv-55m6/GHSA-72m5-fvvv-55m6.json
CWE IDs: ["CWE-203"]
Alternative ID: GHSA-72m5-fvvv-55m6
Finding: F026
Auto approve: 1