---
id: 8826
title: "[CVE-2026-34621] Three Bugs Walk Into a PDF: Prototype Pollution, Served Cold"
cve: CVE-2026-34621
source_domain: starlabs.sg
source_url: "https://starlabs.sg/blog/2026/04-three-bugs-walk-into-a-pdf-prototype-pollution-served-cold/"
published_at: "2026-04-29T00:00:00Z"
tags: ["vulnerability-research", "prototype-pollution", "pdf", "patch-analysis", "in-the-wild", "adobe-acrobat", "cve-2026-34621"]
phying_url: "https://phying.com/item/8826"
lang: en
---

# [CVE-2026-34621] Three Bugs Walk Into a PDF: Prototype Pollution, Served Cold

## Summary

In April 2026, Adobe fixed three chained prototype pollution bugs in Acrobat (CVE-2026-34621/34622/34626) letting malicious PDFs execute code and leak data, with in-the-wild exploitation reported.

## Intelligence Metadata

- **Sources:** starlabs.sg
- **CVE:** CVE-2026-34621
- **Published:** 2026-04-29T00:00:00Z
- **Original:** https://starlabs.sg/blog/2026/04-three-bugs-walk-into-a-pdf-prototype-pollution-served-cold/
- **Phying News:** https://phying.com/item/8826