CVE-2026-2660: FascinatedBox lily lily_symtab.c shorthash_for_name use after free

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-18 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability was identified in FascinatedBox lily up to 2.3. Affected by this issue is the function shorthash_for_name of the file src/lily_symtab.c. The manipulation leads to use after free. Local access is required to approach this attack. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

FascinatedBox lily: through 2.3

References

https://github.com/FascinatedBox/lily/
https://github.com/FascinatedBox/lily/issues/385
https://github.com/oneafter/0122/blob/main/i385/repro.lily
https://vuldb.com/?ctiid.346458
https://vuldb.com/?id.346458
https://vuldb.com/?submit.753164

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