CVE-2026-56669High· 7.5▾ Twilightelysia has Inefficient Algorithmic Complexity and Interpretation Conflict
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.6%
Elysia v1.4.28 is vulnerable to denial-of-service attacks due to CPU exhaustion in the form data normalization code.
Elysia uses getAll to retrieve value from FormData. It is called directly relative to the total number of key-value pairs in the form data. The total amount of work the for loop has to do grows quadratically, so doubling the number of unique key-value pairs quadruples the amount of work. In the above PoC, each .getAll call scans through all of the n key-value pairs in the form data. Because there are n unique keys in the form data, there are .getAll calls, so in total the form data normalizer has to scan n x n key-value pairs.
Endpoints using multipart/form-data
1.4.29
no 100% confirm workaround beside updating the patch
elysia < 1.4.29Upgrade to a patched release:
elysia 1.4.29Connected by shared product, vendor, weakness, or advisory.
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