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CWE-789Weakness · CWE-789

CVE-2026-59649

HIGH · 8.7 CVSS v4.0 Published 2026-08-03
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
96/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available 3 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Bouncy Castle Java: 1.85+ or 2.73.12+ (LTS); Bouncy Castle FIPS: bcpg-fips 1.0.13+, 2.0.13+, or 2.1.13+

  1. 1. Identify the Bouncy Castle library version currently in use by checking project dependencies (pom.xml, build.gradle, or similar)
  2. 2. Identify if using the standard Bouncy Castle library or the FIPS variant, and which version series (1.0.x, 2.0.x, 2.1.x for FIPS)
  3. 3. For standard Bouncy Castle Java: upgrade to version 1.85 or later (or 2.73.12+ for LTS)
  4. 4. For Bouncy Castle FIPS (BC-FJA): upgrade to bcpg-fips 1.0.13+, 2.0.13+, or 2.1.13+ depending on your version series
  5. 5. Update the dependency version in your build configuration file (pom.xml, build.gradle, etc.)
  6. 6. Rebuild the project and run tests to verify compatibility
  7. 7. Deploy the updated application
Caveat Minor; verify no API changes affect existing OpenPGP user-attribute handling code

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-59649 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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