CVE-2026-120752 PyMuPDF - Buffer Overflow

PyMuPDF < 2.0 contains a stack-based buffer overflow caused by copying caller-supplied callout points into a fixed three-element stack array in JM_set_annot_callout_line, letting attackers crash the process or execute code by supplying four or more points via Page.add_freetext_annot.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2 November 2026
Updated
3 November 2026
Weakness
CWE-121

Vendor fix

Update to version 2.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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