CVE-2026-63570
- Source
- https://cve.org/CVERecord?id=CVE-2026-63570
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63570.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63570
- Published
- 2026-10-02T07:01:18Z
- Modified
- 2026-10-28T02:30:43Z
- Severity
-
- 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Pkcs12Store.GetCertificateChain loops forever on cyclic issuer links
- Details
-
Loop with unreachable exit condition in Pkcs12Store.GetCertificateChain in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a crafted PKCS#12 file to an application that loads it and requests a key entry's certificate chain to cause a denial of service, in which the call never returns and consumes CPU and memory until an OutOfMemoryException, via certificates whose issuer links form a cycle, for example two certificates whose AuthorityKeyIdentifier extensions each identify the other's public key. This happens because the chain-building loop stops only when no issuer is found or a certificate links to itself, and keeps no record of certificates already visited. The key-identifier links are followed without checking signatures.
- Database specific
{ "cna_assigner": "bcorg", "cwe_ids": [ "CWE-835" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63570.json" }- References
-
- https://www.nuget.org/packages/BouncyCastle.Cryptography
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63570.json
- https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63570
- https://nvd.nist.gov/vuln/detail/CVE-2026-63570
- https://github.com/bcgit/bc-csharp/commit/1b8fad04df4953230c9951c57678ee45c8aead85
- https://github.com/bcgit/bc-csharp
Affected packages
Git / github.com/bcgit/bc-csharp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/bcgit/bc-csharp
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.7.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "1b8fad04df4953230c9951c57678ee45c8aead85" } ], "source": "REFERENCES_COMMIT" } ] }