CVE•Published 2026-08-03•Modified 2026-09-02•0 articles on news•4 live references•NVD data

CVE-2026-12802Bouncycastle · Bc-java

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS percentile

Exploit Prediction Scoring System · top 94% of all CVEs

Weaknesses (CWE)

CWE-354Improper Validation of Integrity Check Value

Description

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).

Timeline

Published 2026-08-03

Modified 2026-09-02

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-12802

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Bouncycastle Bc-java"

All exposed Bouncycastle Bc-java instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Bc-java"

HTTP body or banner mentions "Bc-java" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-12802