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CVE-2021-46877 is an uncontrolled resource-consumption vulnerability in FasterXML jackson-databind. In uncommon scenarios involving JDK serialization of JsonNode objects, processing a crafted read can allocate approximately 2 GB of transient heap memory. The issue affects jackson-databind 2.10.x through 2.12.5 and 2.13.0.
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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.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Jackson Databind denial of service when JDK serialization is used to serialize JsonNode.
A possible Jackson Databind denial-of-service vulnerability when JDK serialization is used to serialize JsonNode.
Unknown
A potential denial-of-service vulnerability in jackson-databind when JDK serialization is used to serialize JsonNode.
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.