CVE-2026-77220
Discovered by AISLEPUBLISHEDCWE-825
Description
PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.
CVSS Base Scores
CVSS v4.07.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| pdfio | — | — |