CVE-2026-15055
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
In Bouncy Castle for Java before 1.85, PKCS#8 / PBES2 decryptors honor an unbounded KDF cost from input. This also affects LTS before 2.73.12 and FIPS versions before specific bcpkix-fips releases.
Risk Assessment
An attacker can supply a malicious key with a very high KDF cost, leading to a DoS attack via excessive CPU load during decryption.
Recommendation
Upgrade Bouncy Castle to version 1.85 (or LTS 2.73.12 / appropriate FIPS version).
Other vulnerabilities in Bouncy Castle
See all- CVE-2026-58062Critical
In Bouncy Castle for Java before 1.85, a Stapled OCSP response is accepted without binding to the checked certificate. This issue also affects LTS before 2.73.12 and FIPS before 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
- CVE-2026-8763Critical
In Bouncy Castle for Java before 1.85, Name Constraints can be bypassed via a trailing dot in rfc822Name and URI. This issue also affects LTS before 2.73.12 and FIPS before appropriate versions.
- CVE-2026-59650Critical
In Bouncy Castle for Java before 1.85, the MTI/A0 Diffie-Hellman key agreement exponentiates an unvalidated peer value. This issue also affects LTS before 2.73.12.
- CVE-2026-14682High
In Bouncy Castle for Java before 1.85, a possible Out-of-Memory (OOM) condition exists due to unbounded up-front allocation on a definite-length read. This issue also affects LTS and FIPS versions.
- CVE-2026-13586High
In Bouncy Castle for Java before 1.85, the PKCS#12 MAC and bag-decryption KDF iteration-count bound can lead to DoS. This issue also affects LTS before 2.73.12 and BC-FJA before specific versions.
- CVE-2026-13506High
In Bouncy Castle for Java before 1.85, a Lazy ASN.1 sequence forces resetting the nesting-depth guard. This issue also affects LTS and FIPS versions.
- CVE-2026-12860Medium
In Bouncy Castle for Java before 1.85, RSA PKCS#1 signature verification skips the last two hash bytes in the NULL-omitted path. This issue also affects LTS before 2.73.12.
- CVE-2026-12852High
In Bouncy Castle for Java before 1.85, the MLS wire decoder allocates attacker-declared opaque length before bounds check.
- CVE-2026-12817High
In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips the final tag on chunk-aligned data. This issue also affects LTS and FIPS versions.
- CVE-2026-12816High
In Bouncy Castle for Java before 1.85, the IESEngine in stream mode allows MAC forgery via length-dependent KDF split. This issue also affects LTS before 2.73.12.
Original NVD description (English source)
In Bouncy Castle for Java before 1.85, PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).