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CVE-2026-59649 is a memory-exhaustion denial-of-service vulnerability in Bouncy Castle for Java OpenPGP processing. OpenPGP user-attribute subpacket lengths are bounded only by the Java Virtual Machine maximum memory, allowing a maliciously large declared length to drive excessive memory allocation while crafted OpenPGP data is processed. Affected releases are Bouncy Castle for Java before 1.85, Bouncy Castle for Java LTS before 2.73.12, and BC-FJA bcpg-fips before 1.0.13, 2.0.13, and 2.1.13 in their respective release branches.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity denial-of-service vulnerability in Bouncy Castle for Java's OpenPGP processing. An unbounded user-attribute subpacket length can cause memory consumption up to the JVM maximum heap size.
Bouncy Castle for Java denial of service through an unbounded OpenPGP user-attribute subpacket length.
Bouncy Castle OpenPGP user-attribute parsing denial of service due to an unbounded subpacket length.
An uncontrolled OpenPGP user-attribute subpacket-length issue in Bouncy Castle for Java that is bounded only by the JVM maximum memory, potentially enabling excessive memory consumption.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.