VulnSocial

CVE-2026-8763Disclosure(bouncycastle / bc-java)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. 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).

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0.0/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-295

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • bc-java
  • bouncy_castle_for_java_lts
  • fips_java_api

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
bouncycastle
Products
bc-javabouncy_castle_for_java_ltsfips_java_api

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-08-03: 1Technical Details · 2026-08-03: 108-03
Signal classification1 categories
Disclosure
1100.0%
Referenced assets2 URLs
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-8763 Name Constraints Bypass via Trailing Dot in Bouncy Castle ... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-8763 Don't wait vulnerability scanning results: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=2

    Post summary

    A new CVE (CVE-2026-8763) involving a Name Constraints bypass in Bouncy Castle is referenced with a link to vulnerability details, but no exploit, patch, or PoC information is provided.

    00000121
    4.1K followersView on X
CPE platform detail3 entries

3 of 3 entries

PartVendorProductVersionTarget SWTarget HW
Appbouncycastlebc-java---
Appbouncycastlebouncy_castle_for_java_lts---
Appbouncycastlefips_java_api---

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