CVE-2026-63572

highpriority · track · 0EPSS 0.003 · 26 %ileDE

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.33% (26th) EPSS

CVSS 7.1 · high

Is it mine?

12 products

Check your exposure

Who says so?

1 sources

cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.1

v4.07.1highCVSS: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:Xsecondary

v4.04.9mediumCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770US

affected products (12)

Products and version ranges known to be affected.

Open Source Bouncy Castle bc-csharp <2.7.0all versionscert_bundDE
Open Source Bouncy Castle for Java <1.86all versionscert_bundDE
Open Source Bouncy Castle for Java FIPS <1.0.13all versionscert_bundDE
Open Source Bouncy Castle for Java FIPS <2.0.13all versionscert_bundDE
Open Source Bouncy Castle for Java FIPS <2.1.13all versionscert_bundDE
Open Source Bouncy Castle for Java LTS <2.73.13all versionscert_bundDE
Open Source Bouncy Castle≤ for Java LTS <2.73.13cert_bundDE
Open Source Bouncy Castle≤ bc-csharp <2.7.0cert_bundDE
Open Source Bouncy Castle≤ for Java <1.86cert_bundDE
Open Source Bouncy Castle≤ for Java FIPS <1.0.13cert_bundDE
Open Source Bouncy Castle≤ for Java FIPS <2.0.13cert_bundDE
Open Source Bouncy Castle≤ for Java FIPS <2.1.13cert_bundDE

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3713Bouncy Castle: Mehrere SchwachstellenDeutsch2026-10-01csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Bouncy Castle ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren oder offenzulegen und einen Denial-of-Service-Zustand auszulösen.

sources

Which sources assert this record, and when.

cert_bund NVD CVE.org MITRE

published 2026-10-02modified 2026-10-02

references (6) nvd

External citations — patches, advisories, analysis.

scry

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