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[NEW] [medium] Bouncy Castle: Vulnerability allows unspecified attack

mediumCVE-2026-15997
A local attacker can exploit a vulnerability in Bouncy Castle to carry out an unspecified attack.

CSIRTS triage

vendor: Bouncy Castleproduct: Bouncy CastleOther
What
A vulnerability allows a local attacker to carry out an unspecified attack.
Who is affected
Local deployments of Bouncy Castle.
Urgency
Remediation is medium due to the unspecified nature of the attack and medium severity.
Action
Monitor for updates from Bouncy Castle regarding this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-07-17
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2399

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-15997coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Bouncy Castle

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories