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CVE-2026-14682— Possible OOM from unbounded up-front allocation on a definite-length read

CVSS 8.7 · High EPSS 0.26% · P18

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 6

VendorProductVersion RangeStatus
Legion of the Bouncy Castle Inc.BC-FJA1.0.0< 1.0.2.7affected
2.0.0< 2.0.2affected
2.1.0< 2.1.3affected
1.0.0< 1.0.24affected
Legion of the Bouncy Castle Inc.BC-JAVA< 1.85affected
Legion of the Bouncy Castle Inc.BC-LTS-JAVA2.73.0< 2.73.12affected
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I. Basic Information for CVE-2026-14682

Vulnerability Information
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Vulnerability Title
Possible OOM from unbounded up-front allocation on a definite-length read
Source: CVE Program / CVE List V5
Vulnerability Description
In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length read. 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), and before bctls-fips 1.0.24.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Legion of the Bouncy Castle Inc BC-JAVA 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Legion of the Bouncy Castle Inc BC-JAVA是Legion of the Bouncy Castle Inc组织的一个提供加密算法的Java组件。 Legion of the Bouncy Castle Inc BC-JAVA 1.85之前版本、Bouncy Castle for Java LTS 2.73.12之前版本和Bouncy Castle for Java FIPS (BC-FJA)（bc-fips 1.0.2.7之前版本、2.0.2之前版本和2.1.3之前版本
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Legion of the Bouncy Castle Inc.BC-JAVA 0 ~ 1.85 -
Legion of the Bouncy Castle Inc.BC-LTS-JAVA 2.73.0 ~ 2.73.12 -
Legion of the Bouncy Castle Inc.BC-FJA 1.0.0 ~ 1.0.2.7 -
Legion of the Bouncy Castle Inc.BC-FJA 1.0.0 ~ 1.0.24 -

II. Public POCs for CVE-2026-14682

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III. Intelligence Information for CVE-2026-14682

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Patches & Fixes for CVE-2026-14682 (1)

Vendor Advisories for CVE-2026-14682 (1)

Other References for CVE-2026-14682 (1)

Same Patch Batch · Legion of the Bouncy Castle Inc. · 2026-08-03 · 32 CVEs total

CVE-2026-596389.3 CRITICALJSSE hostname verifier CN-fallback enabled by default despite documented opt-in
CVE-2026-580629.3 CRITICALStapled OCSP response accepted without binding to the checked certificate
CVE-2026-87639.3 CRITICALName Constraints bypass via trailing dot in rfc822Name and URI
CVE-2026-596509.3 CRITICALMTI/A0 DH agreement exponentiates unvalidated peer value
CVE-2026-596448.7 HIGHMLS hash-ratchet honours arbitrary 32-bit generation counter from sender
CVE-2026-135068.7 HIGHLazy ASN.1 sequence forcing resets nesting-depth guard
CVE-2026-128028.7 HIGHCMS AuthEnvelopedData fails to enforce tag-length on decryption
CVE-2026-128178.7 HIGHOpenPGP AEAD decryption skips final tag on chunk-aligned data
CVE-2026-128168.7 HIGHIESEngine stream-mode MAC forgery via length-dependent KDF split
CVE-2026-128038.7 HIGHKCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery)
CVE-2026-128608.7 HIGHRSA PKCS#1 verification skips last two hash bytes in NULL-omitted path
CVE-2026-128528.7 HIGHMLS wire decoder allocates attacker-declared opaque length before bounds check
CVE-2026-580618.7 HIGHCCM-family modes write plaintext to caller buffer before tag check
CVE-2026-580598.7 HIGHQuadratic-time escaping when stringifying X.500 distinguished names
CVE-2026-580608.7 HIGHHSS public-key level count unbounded, enabling huge allocation on verify
CVE-2026-596458.7 HIGHOER parser recurses without depth limit on self-referential IEEE 1609.2 schema
CVE-2026-596428.7 HIGHCMS AuthenticatedData content not bound to MAC when authAttrs present
CVE-2026-596418.7 HIGHS/MIME validator trusts signer-asserted signingTime for path validation
CVE-2026-596438.7 HIGHOpenPGP inline-signature policy failures silently ignored
CVE-2026-596468.7 HIGHDTLS handshake reassembler allocates buffer from unchecked 24-bit length

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: BC-JAVA
Same vendor: Legion of the Bouncy Castle Inc.
Same weakness: CWE-789

V. Comments for CVE-2026-14682

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