CVE-2026-63572

Allocation of resources without limits in PKCS#12 keystore loading (Pkcs12Store.Load) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can supply a PKCS#12 (PFX) file to cause a denial of service through CPU exhaustion via an iteration count close to 2^31 in the file's MacData or in the PBE parameters of an encrypted SafeContents or shrouded key bag, because the counts are taken from the file without an upper bound and the key derivation runs before the MAC or the password can be checked. A zero or negative count is covered by CVE-2026-63575. Pkcs12Utilities.ConvertToDefiniteLength is also affected.

• CWE-770

• https://github.com/bcgit/bc-csharp/commit/34a7c05f719c91c024f285c6b420d3c00f8019ddPatch
• https://github.com/bcgit/bc-csharp/commit/54ea0b179ee627027829b44c45d6dd32e575bd67Patch
• https://github.com/bcgit/bc-csharp/commit/7c0ed15f9783c9595b1a53f3900136461fd944f4Patch
• https://github.com/bcgit/bc-csharp/commit/b57165ecb7790ecea08273b219d52d80c12990e4Patch
• https://github.com/bcgit/bc-csharp/commit/c00fc018fca89c077c64dd2a2a2eb00ae7d97241Patch
• https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63572Patch, Vendor Advisory

Published

Oct 2, 2026

Last Modified

Oct 28, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2026-63568Allocation of resources without limits or throttling in the …7.5
• CVE-2026-63569Improper input validation in DHAgreement.CalculateAgreement …6.5
• CVE-2026-6357pip prior to version 26.1 would run self-update check functi…5.3
• CVE-2026-63570Loop with unreachable exit condition in Pkcs12Store.GetCerti…7.5
• CVE-2026-63571Improper verification of cryptographic signature in the attr…7.5
• CVE-2026-63573Observable discrepancy in the CMS RSA PKCS#1 v1.5 key-transp…7.5
• CVE-2026-63574Memory allocation with excessive size value in the OpenPGP s…7.5
• CVE-2026-63575Loop with unreachable exit condition in the PKCS#12 key deri…7.5
• CVE-2026-63576Improper certificate validation in PkixNameConstraintValidat…7.5
• CVE-2026-63577Improper certificate validation in the directoryName name-co…7.5
• CVE-2026-63578Allocation of resources without limits in password-based pri…7.5