VulnerabilityAnalyzed

CVE-2026-58063

In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file.

MEDIUM 5.3EPSS 0.36%

Does this matter?

Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own.

Description

In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

CVSS 4.0: 5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/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/M
EPSS: 0.36% probability · 30th percentile
CISA KEV: Not listed
Weakness: CWE-770
Affected: bouncycastle/bc-java · bouncycastle/bouncy castle for java lts · bouncycastle/fips java api
Source: 91579145-5d7b-4cc5-b925-a0262ff19630

References

https://github.com/bcgit/bc-java/commit/81737a56ef4489da1f849cf549df95e338ea6b06Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9058063Third Party Advisory, Patch

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.