CVE-2026-63578
- Source
- https://cve.org/CVERecord?id=CVE-2026-63578
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63578.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63578
- Published
- 2026-10-02T07:08:15Z
- Modified
- 2026-10-28T02:30:47Z
- 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
- Unbounded PBE iteration count when decrypting PKCS#8 private keys
- Details
-
Allocation of resources without limits in password-based private-key decryption (PbeUtilities.GenerateCipherParameters) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply an encrypted private key, such as a PKCS#8 EncryptedPrivateKeyInfo or "ENCRYPTED PRIVATE KEY" PEM file, to cause a denial of service through CPU exhaustion via an iteration count close to 2^31, because the count is taken from the unauthenticated algorithm parameters without an upper bound and the key derivation runs before the password or the data can be checked. PKCS#5 PBES1 and PBES2 (PBKDF2), the PKCS#12 PBE algorithms and CMS password recipients (CmsPbeKey) are affected. Loading PKCS#12 files with Pkcs12Store is covered by CVE-2026-63572, and a zero or negative count with the PKCS#12 algorithms by CVE-2026-63575.
- Database specific
{ "cna_assigner": "bcorg", "cwe_ids": [ "CWE-770" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63578.json" }- References
-
- https://www.nuget.org/packages/BouncyCastle.Cryptography
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63578.json
- https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63578
- https://nvd.nist.gov/vuln/detail/CVE-2026-63578
- https://github.com/bcgit/bc-csharp/commit/34a7c05f719c91c024f285c6b420d3c00f8019dd
- https://github.com/bcgit/bc-csharp/commit/54ea0b179ee627027829b44c45d6dd32e575bd67
- https://github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f3900136461fd944f4
- https://github.com/bcgit/bc-csharp/commit/b57165ecb7790ecea08273b219d52d80c12990e4
- https://github.com/bcgit/bc-csharp/commit/c00fc018fca89c077c64dd2a2a2eb00ae7d97241
- 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 affectedFixedFixedFixedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.7.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "c00fc018fca89c077c64dd2a2a2eb00ae7d97241" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "54ea0b179ee627027829b44c45d6dd32e575bd67" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "7c0ed15f9783c9595b1a53f3900136461fd944f4" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "34a7c05f719c91c024f285c6b420d3c00f8019dd" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "b57165ecb7790ecea08273b219d52d80c12990e4" } ], "source": "REFERENCES_COMMIT" } ] }