CVE-2026-63572

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-63572
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63572.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63572
Published
2026-10-02T07:04:37Z
Modified
2026-10-04T02:46:54Z
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 MAC and bag-decryption iteration counts when loading PKCS#12 files
Details

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.

Database specific 
{
    "cna_assigner": "bcorg",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63572.json"
}
References

Affected packages

Git / github.com/bcgit/bc-csharp

Affected ranges

Type
GIT
Repo
https://github.com/bcgit/bc-csharp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4007498b13582d90ee1eda5d9920c324428b98b3
Fixed
34a7c05f719c91c024f285c6b420d3c00f8019dd
Fixed
54ea0b179ee627027829b44c45d6dd32e575bd67
Fixed
7c0ed15f9783c9595b1a53f3900136461fd944f4
Fixed
b57165ecb7790ecea08273b219d52d80c12990e4
Fixed
c00fc018fca89c077c64dd2a2a2eb00ae7d97241
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.7.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

release-1.*
release-1.8.0
release-1.8.0-RC.1
release-1.8.0-RC.2
release-1.8.0-RC.3
release-1.8.0-beta.1
release-1.8.0-beta.2
release-1.8.0-beta.3
release-1.8.0-beta.4
release-1.8.1
release-1.8.10
release-1.8.2
release-1.8.3
release-1.8.4
release-1.8.5
release-1.8.6
release-1.8.7
release-1.8.8
release-1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63572.json"