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CVE-2026-120752 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/pymupdf/PyMuPDF/issues/5112	CISA-ADP
https://github.com/pymupdf/PyMuPDF	[email protected]
https://github.com/pymupdf/PyMuPDF/blob/1.28.2/src/extra.i#L787-L797	[email protected]
https://github.com/pymupdf/PyMuPDF/commit/d4298ead84ceeae1c9065c81cd9a275a1b092f5e	[email protected]
https://github.com/pymupdf/PyMuPDF/issues/5112	[email protected]
https://github.com/pymupdf/PyMuPDF/issues/5173	[email protected]
https://github.com/pymupdf/PyMuPDF/releases/tag/2.0	[email protected]
https://www.vulncheck.com/advisories/pymupdf-1.25.3-before-2.0-stack-buffer-overflow-via-add-freetext-annot-callout	[email protected]

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-121	Stack-based Buffer Overflow	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 7, 2026	CVE Modified	CISA-ADP
Nov 2, 2026	New CVE Received	[email protected]