No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.
Description
PyMuPDF 1.25.3 before 2.0 contains a stack-based buffer overflow vulnerability in JM_set_annot_callout_line() that copies a caller-supplied number of callout points into a fixed three-element stack array. Attackers who control the callout argument passed to Page.add_freetext_annot() can supply four or more points to overwrite the stack frame, crashing the process or executing code.
Exploits & detection
No public PoC or detection template found yet.
Timeline
- Published: 02 Nov 2026
- Last modified upstream: 07 Nov 2026
Sources & licenses
- CVE / CVSS / CWE
- NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
- Exploitation
- CISA KEV (CC0) · EPSS by FIRST.org
- References used for the analysis
- https://github.com/pymupdf/PyMuPDF
- https://github.com/pymupdf/PyMuPDF/blob/1.28.2/src/extra.i#L787-L797
- https://github.com/pymupdf/PyMuPDF/commit/d4298ead84ceeae1c9065c81cd9a275a1b092f5e
- https://github.com/pymupdf/PyMuPDF/issues/5112
- https://github.com/pymupdf/PyMuPDF/issues/5173
- https://github.com/pymupdf/PyMuPDF/releases/tag/2.0
- https://www.vulncheck.com/advisories/pymupdf-1.25.3-before-2.0-stack-buffer-overflow-via-add-freetext-annot-callout
- https://github.com/pymupdf/PyMuPDF/issues/5112
- Analysis, summary and remediation
- © VulnCrest