ZDI-26-669: Adobe Acrobat Reader DC JBIG2 File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
ZDI advisory ZDI-26-669 details an out-of-bounds read (CVE-2026-81978) when Adobe Acrobat Reader DC parses JBIG2 files.
The Zero Day Initiative published advisory ZDI-26-669 for an out-of-bounds read triggered when Acrobat Reader DC parses JBIG2 files. Successful exploitation allows a remote attacker to disclose sensitive information from affected installations. User interaction is required, such as opening a malicious file or visiting a malicious page. ZDI rated the issue 3.3 and assigned CVE-2026-81978.
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