What is CVE-2026-5186?

CVE-2026-5186 is a medium-severity vulnerability in Nothings Stb, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-03-31.

How severe is CVE-2026-5186?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Nothings Stb

CVE-2026-5186

A weakness has been identified in Nothings stb up to 2.30. This impacts the function stbi__load_gif_main of the file stb_image.h of the component Multi-frame GIF File Handler. This manipulation causes double free. The attack requires local…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Nothings Stb — versions 2.0, 2.1, 2.2

Weakness classification (CWE)

References

VDB-354254 | Nothings stb Multi-frame GIF File stb_image.h stbi__load_gif_main double free (technical-description, vdb-entry)
VDB-354254 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #780395 | nothings stb stb_image.h <= 2.30 Double Free (third-party-advisory)

Frequently asked questions

What is CVE-2026-5186?: CVE-2026-5186 is a medium-severity vulnerability in Nothings Stb, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-03-31.
How severe is CVE-2026-5186?: Medium severity. CVSS v3 base score is 5.3 out of 10.