CVE-2026-110677Published

Cpanel::JSON::XS versions from 4.28 before 4.80 for Perl leak the array collecting duplicate key values under dupkeys_as_arrayref in decode_hv

Exact source revision recorded 29 Oct 2026 18:12:12 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-110677

Published

Cpanel::JSON::XS versions from 4.28 before 4.80 for Perl leak the array collecting duplicate key values under dupkeys_as_arrayref in decode_hv. With dupkeys_as_arrayref, the values of a duplicate object key are collected into a new array. An extra reference is never released, so the array and every value in it outlive the decoded structure. The array also leaks when decoding fails after a duplicate key. Repeatedly decoding untrusted JSON with a duplicate key holding a large value exhausts process memory.

Source published: 19 Oct 2026 18:11:53 UTC
Source modified: 29 Oct 2026 16:43:21 UTC
Observed here: 29 Oct 2026 18:12:12 UTC
Source terms: CVE Program Terms of Use

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