CVE-2026-103600
- Source
- https://cve.org/CVERecord?id=CVE-2026-103600
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103600.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-103600
- Published
- 2026-10-02T07:08:51Z
- Modified
- 2026-10-28T02:31:02Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Unbounded ASN.1 nesting depth causes process-terminating stack overflow
- Details
-
Uncontrolled recursion in the ASN.1 parser (Asn1InputStream, Asn1StreamParser) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service via a crafted ASN.1 encoding of deeply nested constructed elements (for example SEQUENCE inside SEQUENCE, in definite-length DER or indefinite-length BER form), because each nesting level is parsed by a further recursive call with no bound on depth. About 2,000 levels (8 KB of DER) are enough to exhaust a 1.5 MB thread stack, the .NET main-thread default on Windows, and raise a StackOverflowException, which .NET cannot catch and which terminates the whole process; on threads with larger stacks, parse time instead grows quadratically with depth (about 9 seconds of CPU for a 64 KB input). Any path that parses untrusted ASN.1 is exposed, including X.509 certificates and CRLs, CMS/PKCS#7, PKCS#8/PKCS#12, OCSP and TLS Certificate messages.
- Database specific
{ "cna_assigner": "bcorg", "cwe_ids": [ "CWE-674" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103600.json" }- References
-
- https://www.nuget.org/packages/BouncyCastle.Cryptography
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103600.json
- https://github.com/bcgit/bc-csharp/wiki/CVE-2026-103600
- https://nvd.nist.gov/vuln/detail/CVE-2026-103600
- https://github.com/bcgit/bc-csharp/commit/89c81b0da7fe11cd70013285560bbc472cb73901
- https://github.com/bcgit/bc-csharp/commit/b99f4e3dcea05b57becc79dfa6ad91a54c778d65
- 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 affectedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.7.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "89c81b0da7fe11cd70013285560bbc472cb73901" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "b99f4e3dcea05b57becc79dfa6ad91a54c778d65" } ], "source": "REFERENCES_COMMIT" } ] }