AZL-89399
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-89399.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-89399
- Upstream
- Published
- 2026-06-03T01:16:23Z
- Modified
- 2026-08-29T05:25:22Z
- Summary
- CVE-2026-9516 affecting package perl-Cpanel-JSON-XS 4.39-1
- Details
-
Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.
To skip a leading 3-byte UTF-8 BOM, decodejson() advances the input scalar's string pointer past the mark with SvPVset() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filterjsonobject callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.
When that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller.
- References