Prototype Pollution in Adobe Acrobat
CVE-2026-34622
Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Vulnerability class: Prototype Pollution
EPSS: 0.004 (35.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- psirt@adobe.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34622?
- CVE-2026-34622 is a high-severity vulnerability in Adobe Acrobat, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.6/10. Published 2026-04-14.
- How severe is CVE-2026-34622?
- High severity. CVSS v3 base score is 8.6 out of 10.