The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impac
The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher vulnerability in simple RSA CMS signatures without signed attributes."
- Published
- Mar 29, 2009
- Updated
- Jun 16, 2026
- EPSS
- 2.4% · 83th percentile
- CWE
- —
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Report tools
Action score
41
Plan
Add it to your regular patch cycle.
- CVSS
- 40 / 40 · 10.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| bouncycastle | bc-java | cpe:2.3:a:bouncycastle:bc-java |
| bouncycastle | bouncy-castle-crypto-package | cpe:2.3:a:bouncycastle:bouncy-castle-crypto-package |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- bouncycastle bc-javaup to 1.37 inclusive
- bouncycastle bc-java1.01
- bouncycastle bc-java1.02
- bouncycastle bc-java1.03
- bouncycastle bc-java1.04
- bouncycastle bc-java1.05
- bouncycastle bc-java1.06
- bouncycastle bc-java1.07
- bouncycastle bc-java1.08
- bouncycastle bc-java1.09
- bouncycastle bc-java1.10
- bouncycastle bc-java1.11
- bouncycastle bc-java1.12
- bouncycastle bc-java1.13
- bouncycastle bc-java1.14
- bouncycastle bc-java1.15
- bouncycastle bc-java1.16
- bouncycastle bc-java1.17
- bouncycastle bc-java1.18
- bouncycastle bc-java1.19
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | bouncycastle | before 1.38-1 | 1.38-1 |
| Maven | bouncycastle:bcprov-jdk14 | before 1.38 | 1.38 |
| Maven | bouncycastle:bcprov-jdk15 | before 1.38 | 1.38 |
| Maven | bouncycastle:bcprov-jdk16 | before 1.38 | 1.38 |
Same product
bouncycastle: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-1000613Legion of the Bouncy Castle Legion of the Bouncy Castle Java Cryptography APIs 1.58 up to but not including 1.60 contains a CWE-470: Use of 40Plan
- CVE-2026-58062Stapled OCSP response accepted without binding to the checked certificate37Monitor
- CVE-2026-8763Name Constraints bypass via trailing dot in rfc822Name and URI37Monitor
- CVE-2026-59650MTI/A0 DH agreement exponentiates unvalidated peer value37Monitor
- CVE-2026-59638JSSE hostname verifier CN-fallback enabled by default despite documented opt-in37Monitor
- CVE-2026-14682Possible OOM from unbounded up-front allocation on a definite-length read34Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:bouncycastle | 1.38-1 · Debian:12 | Package registry (OSV) |
| Maven:bouncycastle:bcprov-jdk14 | 1.38 | Package registry (OSV) |
| Maven:bouncycastle:bcprov-jdk15 | 1.38 | Package registry (OSV) |
| Maven:bouncycastle:bcprov-jdk16 | 1.38 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
- freshmeat.net/projects/bouncycastlecryptoapi/releases/265580
- www.bouncycastle.org/csharp/
- www.bouncycastle.org/devmailarchive/msg08195.html
- www.bouncycastle.org/releasenotes.html
- www.osvdb.org/50358
- www.osvdb.org/50359
- www.osvdb.org/50360
Vendor advisories and official records. Exploit/PoC links are deliberately left out.