CVE catalog
CVE-2020-26939
bouncycastle: CVE-2020-26939
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.92% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | bouncycastle | sid | 1.86.2-1 | fixed |
| Debian | bouncycastle | forky | 1.86-1 | fixed |
| Debian | bouncycastle | trixie | 1.80-3 | fixed |
| Debian | bouncycastle | bookworm | 1.72-2 | fixed |
| Ubuntu | bouncycastle | pro | 1.57-1 | vulnerable |
| Ubuntu | bouncycastle | pro | 1.58-1 | vulnerable |
| Ubuntu | bouncycastle | pro | 1.59-1 | vulnerable |
| Ubuntu | bouncycastle | pro | 1.59-1ubuntu0.1~esm1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | bouncycastle | source | sid | 1.61-1 | not yet assigned | Not reported | Not reported |
| Debian | bouncycastle | source | forky | 1.61-1 | not yet assigned | Not reported | Not reported |
| Debian | bouncycastle | source | trixie | 1.61-1 | not yet assigned | Not reported | Not reported |
| Debian | bouncycastle | source | bookworm | 1.61-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libbcjmail-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbcmail-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbcpg-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbcpkix-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbcprov-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbctls-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
- [libbcutil-java]Fixed
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
1.72-2· all · bookwormFixed · Fixed:
1.61-1dsa · bouncycastle · debian · bookworm; dsa · bouncycastle · debian · 12
[Debian 13 (Trixie)]
- [libbcjmail-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbcmail-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbcpg-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbcpkix-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbcprov-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbctls-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
- [libbcutil-java]Fixed
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
1.80-3· all · trixieFixed · Fixed:
1.61-1dsa · bouncycastle · debian · 13
Observed: