CVE-2026-15055: PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input
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).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-15055?
CVE-2026-15055 has a risk score of 33, indicating it poses a moderate threat.
How do I fix CVE-2026-15055?
To fix CVE-2026-15055, upgrade to Bouncy Castle for Java version 1.85 or later, or to the specified versions in the LTS and FIPS series.
What vulnerable software versions does CVE-2026-15055 affect?
CVE-2026-15055 affects Bouncy Castle for Java versions before 1.85, along with specific versions of Bouncy Castle LTS and FIPS.
What impact does CVE-2026-15055 have on PKCS#8 / PBES2 decryptors?
CVE-2026-15055 allows PKCS#8 / PBES2 decryptors to accept unbounded Key Derivation Function (KDF) cost from input, potentially leading to denial of service.
When was CVE-2026-15055 published?
CVE-2026-15055 was published on August 3, 2026.