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CVE-2026-5598 is a covert timing-channel vulnerability in the BC-JAVA core modules' FrodoKEM decryption implementation in FrodoEngine.java. Non-constant-time comparisons cause decryption processing time to vary, allowing observable timing differences while processing FrodoKEM encapsulations. Affected BC-JAVA versions are 1.71 through versions before 1.80.2, 1.81 through versions before 1.81.1, and 1.82 through versions before 1.84.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Potential information disclosure vulnerability in SAP Commerce Cloud involving the Bouncy Castle Java library.
A potential information disclosure vulnerability in the Bouncy Castle Java library affecting SAP Commerce Cloud.
A Bouncy Castle vulnerability that may leak private key material due to non-constant-time comparisons.
A Bouncy Castle vulnerability that can leak private key material due to non-constant-time comparisons.
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.