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CVE

CVE-2026-8763

Name Constraints bypass via trailing dot in rfc822Name and URI
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CVE

CVE-2026-8763

Name Constraints bypass via trailing dot in rfc822Name and URI

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).

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
C
H
U
0
-
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Related Resources

No items found.

References

https://www.bouncycastle.org/download/bouncy-castle-java-fips/, https://www.bouncycastle.org/download/bouncy-castle-java-lts/, https://www.bouncycastle.org/download/bouncy-castle-java/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8763.json, https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908763, https://nvd.nist.gov/vuln/detail/CVE-2026-8763, https://github.com/bcgit/bc-java/commit/2c28b253a44681fbbc562561eab6ad383d2ae558, https://github.com/bcgit/bc-java, https://github.com/bcgit/bc-lts-java

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.0043%
EPSS Percentile
0.36344%
Introduced Version
468b5082f3f0971e80bf9edb7029c17b39b9ba0c,0,1.0.0,2.0.0,2.1.0,1.0.2,2.73.4,1.55,1.84,1.52,1.53,1.64,1.71,2.73.9,2.73.11,1.60,1.68,1.45,1.43,1.46,1.40,1.63,2.73.0
Fix Available
f101b232c5d3e07ecdd504210a57e43831d6cd65,2c28b253a44681fbbc562561eab6ad383d2ae558,1.0.2.7,2.0.2,2.1.3,2.73.5,1.85,2.73.12,0:1.70-4.amzn2023.0.8,2.1.3-r0

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