[Security] CVE-2023-28856: HINCRBYFLOAT produces invalid ziplist values

[vulgraph]

Vulnerability

KeyDB inherits CVE-2023-28856 from Redis — HINCRBYFLOAT accepts extreme floating-point values that produce invalid data in ziplist encoding.

• CVE: CVE-2023-28856

Reproduction

keydb-cli HSET h f 1e308
keydb-cli HINCRBYFLOAT h f 1e308

Produces a 309-digit number stored in ziplist, which can trigger assertion failures on subsequent operations.

Tested Version

KeyDB latest master (git sha 603ebb27).