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CVE Vendors Products Updated CVSS v3.1
CVE-2026-88359 1 Pantoniou 1 Libfyaml 2026-09-27 6.5 Medium
libfyaml 0.9.6 contains a stack exhaustion vulnerability in fy_atom_iter_format(). When processing a specially crafted YAML document containing a very large literal or folded block scalar, the function repeatedly grows an internal buffer using alloca() inside a loop. The allocated stack memory is not released until the function returns, causing cumulative stack growth that can exceed the process stack limit and result in SIGSEGV and denial of service.