CVE-2026-120752

CVSS 7.7 (high) · published 2026-11-02

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.

Weakness: CWE-121

Source: NVD CVE-2026-120752

References

• 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

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