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.
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Affected Vendors & Products
References
History
Fri, 21 Aug 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | PDFio < 1.6.5 Dangling Pointer via Dictionary String-Formatting | |
| Weaknesses | CWE-825 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-21T20:54:34.762Z
Reserved: 2026-08-20T18:25:46.943Z
Link: CVE-2026-77220
No data.
Status : Received
Published: 2026-08-21T21:17:06.737
Modified: 2026-08-21T21:17:06.737
Link: CVE-2026-77220
No data.
OpenCVE Enrichment
Updated: 2026-08-21T22:45:04Z