Medium severity · published Mar 31, 2026
CVE-2026-5186
Nothings stb Multi-frame GIF File stb_image.h stbi__load_gif_main double free
5.3
CVSS
0.1%
EPSS
No
On KEV
Description
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 access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ST
stb · Nothings
2.0; 2.1; 2.2; 2.3; 2.4; 2.5; +25 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5186
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5186
vuldb.com
https://vuldb.com/submit/780395
vuldb.com
https://vuldb.com/vuln/354254
vuldb.com
https://vuldb.com/vuln/354254/cti
More from stb
8.8
CVE-2026-5317
Nothings stb stb_vorbis.c start_decoder out-of-bounds write
8.8
CVE-2026-5315
Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-bounds
8.8
CVE-2026-5314
Nothings stb TTF File stb_truetype.h stbtt_InitFont_internal out-of-bounds
6.5
CVE-2026-102805
Nothings stb Image Encoding stb_image_write.h stbi_write_tga_core integer overflow
6.5
CVE-2026-102804
Nothings stb stb_hexwave.h hexwave_init integer overflow