CVE•Published 2026-08-03•Modified 2026-09-02•0 articles on news•4 live references•NVD data
CVE-2026-12816Bouncycastle · 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
6
Exploit Prediction Scoring System · top 94% of all CVEs
Weaknesses (CWE)
Description
In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
Timeline
Published 2026-08-03
Modified 2026-09-02
External references
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-2026-12816Hosts 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-2026-12816Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-12816Censys host search filtered to this CVE id.
grep.app
CVE-2026-12816Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-12816GitHub code search for direct mentions.
Google dork
"CVE-2026-12816" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (1)
We haven't classified any articles referencing CVE-2026-12816 yet. The external references above still apply.