Allocation of Resources Without Limits or Throttling in libheif - #VU153970
Published: October 8, 2026
Vulnerability identifier: #VU153970
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass application-configured memory allocation limits.
The vulnerability exists due to failure to enforce caller-configured resource limits in libheif's MINI-box parsing when processing untrusted MINI-format HEIF files. A remote attacker can supply a MINI-format file that exceeds the application's configured memory budget to bypass application-configured memory allocation limits.
Only applications that configure stricter-than-default security limits through heif_context_set_security_limits are affected; applications using the default limits are unaffected. MINI parsing is compiled in unconditionally.
Affected software
libheif
Remediation
Install security update from vendor's website.
libheif - update to 1.23.5