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CVE-2010-1866 is an integer-overflow vulnerability in the PHP dechunk filter affecting PHP 5.3 through 5.3.2. While decoding an HTTP chunked-encoding stream, the chunk-size decoder can overflow and produce a negative signed chunk size. The negative value bypasses a maximum-only signed comparison, allowing subsequent processing to operate on an invalid size. The resulting flaw can cause a crash and may lead to heap-based memory corruption.
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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.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An integer overflow vulnerability in the PHP dechunk filter affecting PHP 5.3 through 5.3.2 that can cause a denial of service and possibly memory corruption when decoding HTTP chunked encoding streams.
A vulnerability chain in which integer overflow creates a negative signed value that bypasses a maximum-only range check and leads to a heap-based buffer overflow.
A vulnerability where integer overflow produces a negative signed value that bypasses validation and leads to a heap-based buffer overflow.
A vulnerability where integer overflow produces a negative signed value that bypasses validation and leads to heap-based buffer overflow.
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.