CVEvulnerability
CVE-2026-63570
7.1 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-10-02
- Last modified
- 2026-10-28
- Assigner
- 91579145-5d7b-4cc5-b925-a0262ff19630
- CVSS 4.0 (91579145-5d7b-4cc5-b925-a0262ff19630)
- 7.1 HIGH — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-835
Description
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.
Affected configurations
• bouncycastle bc-csharp (< 2.7.0)
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness