Medium severity · published Oct 8, 2026
CVE-2026-107736
SumatraPDF: stack buffer overflow while processing EXIF Orientation metadata
6.8
CVSS
0.1%
EPSS
No
On KEV
Description
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, MaybeFlipBitmap() asks GDI+ to read the attacker-controlled PropertyTagOrientation size through GetPropertyItem() while supplying only a fixed 64-byte buf on the stack. Opening a crafted TIFF with enough EXIF Orientation values can cause attacker-selected bytes to overwrite stack control data, while tested builds terminate through the stack cookie check. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
sumatrapdf · sumatrapdfreader
<= 3.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107736
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107736
x_refsource_CONFIRM
https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-px68-7vwv-mxpr
x_refsource_MISC
https://github.com/sumatrapdfreader/sumatrapdf/commit/6fe2e0239d8ef3466174ac92f3f56e967ce1a4a7
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