CVE-2026-12802

In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. 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).

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bcgit/bc-java/commit/0fefa539e6ac5c66e1daee5a13b23d1d4769cc01	Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012802	Third Party Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bouncycastle:bc-java::::::::
	cpe:2.3:a:bouncycastle:bcpkix-fips::::::::
	cpe:2.3:a:bouncycastle:bcpkix-fips::::::::
	cpe:2.3:a:bouncycastle:bcpkix-fips::::::::
	cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts::::::::

History

No history.

Information

Published : 2026-08-03 04:16

Updated : 2026-09-02 14:37

NVD link : CVE-2026-12802

Mitre link : CVE-2026-12802

CVE.ORG link : CVE-2026-12802

JSON object : View

Products Affected

bouncycastle

bouncy_castle_for_java_lts
bcpkix-fips
bc-java

CWE

CWE-354

Improper Validation of Integrity Check Value

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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)."}], "lastModified": "2026-09-02T14:37:01.823", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6A5663-2E62-44AA-8A64-A3CB0DC8813B", "versionEndExcluding": "1.85"}, {"criteria": "cpe:2.3:a:bouncycastle:bcpkix-fips:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C878934F-879A-4F9A-B81C-C284BF7797D4", "versionEndExcluding": "1.0.12"}, {"criteria": "cpe:2.3:a:bouncycastle:bcpkix-fips:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0FF4FC3-75CF-4C5C-AEF1-342B8123264B", "versionEndExcluding": "2.0.12", "versionStartIncluding": "2.0.7"}, {"criteria": "cpe:2.3:a:bouncycastle:bcpkix-fips:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A5C3EAC6-7756-48AC-9129-A9BE7E11A8C7", "versionEndExcluding": "2.1.12", "versionStartIncluding": "2.1.8"}, {"criteria": "cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5ED4F42-08FF-4642-815D-1ED0C82FDBD2", "versionEndIncluding": "2.73.11"}], "operator": "OR"}]}], "sourceIdentifier": "91579145-5d7b-4cc5-b925-a0262ff19630"}