CVE-2026-3505: Unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion.

Published Apr 15, 2026
·
Updated

Allocation of resources without limits or throttling vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules). This issue affects BC-JAVA before 1.84.

Unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion.

Other sources

Allocation of resources without limits or throttling vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules).This issue affects BC-JAVA: before 1.84.

Unbounded PGP AEAD chunk size leads to pre-auth resource exhaustion.

— Red Hat

Allocation of resources without limits or throttling, Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules).

This vulnerability is associated with program files AEADEncDataPacket.Java, BcAEADUtil.Java, JceAEADUtil.Java, OperatorHelper.Java.

This issue affects BC-JAVA: from 1.74 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.

— MITRE

Allocation of resources without limits or throttling, Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules). This vulnerability is associated with program files AEADEncDataPacket.Java, BcAEADUtil.Java, JceAEADUtil.Java, OperatorHelper.Java.

This issue affects BC-JAVA: from 1.74 before 1.84.

— NVD

Affected Software

7 affected componentsFixes available
Bouncy Castle BC-JAVA bcpg<1.84
maven/org.bouncycastle:bcpg-jdk18on<1.84
1.84
maven/org.bouncycastle:bcpg-jdk16<=1.46
maven/org.bouncycastle:bcpg-jdk15on<=1.70
maven/org.bouncycastle:bcpg-jdk15to18<1.84
1.84
maven/org.bouncycastle:bcpg-jdk14<1.84
1.84
maven/org.bouncycastle:bcpg-jdk12<=130

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade maven/org.bouncycastle:bcpg-jdk18on to a version that resolves this vulnerability.

    Fixed in 1.84
  2. Upgrade

    Upgrade maven/org.bouncycastle:bcpg-jdk15to18 to a version that resolves this vulnerability.

    Fixed in 1.84
  3. Upgrade

    Upgrade maven/org.bouncycastle:bcpg-jdk14 to a version that resolves this vulnerability.

    Fixed in 1.84

Event History

Apr 15, 2026
CVE Published
via MITRE·09:06 AM
Data Sourced
via MITRE·09:06 AM
DescriptionWeakness
Data Sourced
via Red Hat·10:01 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·10:16 AM
DescriptionSeverityWeakness
Apr 17, 2026
Advisory Published
via GitHub·06:31 PM
Data Sourced
via GitHub·06:31 PM
DescriptionWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-3505?

CVE-2026-3505 is classified as a high severity vulnerability due to the potential for resource exhaustion attacks.

2

How do I fix CVE-2026-3505?

To fix CVE-2026-3505, upgrade Bouncy Castle BC-JAVA bcpg to version 1.84 or later.

3

What does CVE-2026-3505 impact?

CVE-2026-3505 impacts all versions of Bouncy Castle BC-JAVA bcpg prior to 1.84.

4

What type of vulnerability is CVE-2026-3505?

CVE-2026-3505 is an unbounded allocation vulnerability, leading to pre-authentication resource exhaustion.

5

Who is affected by CVE-2026-3505?

Any user or application utilizing Bouncy Castle BC-JAVA bcpg before version 1.84 is affected by CVE-2026-3505.

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