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    CVE-2026-12860

    In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

    Published:Aug 3, 2026
    Last Modified:Aug 28, 2026
    EPS:Aug 3, 2026
    EPSS Score:0.00184
    CVSS Score:5.3

    Affected Products

    Vendor
    Bouncycastle
    Product
    Bc-java
    Vendor
    Bouncycastle
    Product
    Bouncy Castle For Java Lts
    Vendor
    Legion Of The Bouncy Castle Inc.
    Product
    Bc-java
    Vendor
    Legion Of The Bouncy Castle Inc.
    Product
    Bc-lts-java

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    Related CVEs

    CVE-2026-13586 (CVSS 5.3) — In Bouncy Castle for Java before 1.85, PKCS#12 MAC and bag-decryption KDF iteration-count bound (DoS). This is…
    CVE-2026-13506 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also…
    CVE-2026-12852 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bound…
    CVE-2026-12817 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. This iss…
    CVE-2026-12816 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This …
    CVE-2026-12803 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce…
    CVE-2026-12802 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. This i…
    CVE-2026-14682 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length re…
    CVE-2026-58059 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, Quadratic-time escaping when stringifying X.500 distinguished names. Th…
    CVE-2026-58060 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, HSS public-key level count unbounded, enabling huge allocation on verif…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High