# CVE-2026-34627: Adobe InDesign heap overflow in file parsing

Source: https://junglewise.ai/threats/cve-2026-34627-adobe-indesign-heap-overflow-in-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-14. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-34627 · Severity: high · CVSS 7.8 · Published 2026-04-14

Adobe InDesign, a professional desktop publishing software, is vulnerable to a security flaw when processing specially crafted files. If a user opens a malicious document, an attacker could gain the ability to run unauthorized commands or software on the victim's computer. This could lead to the theft of sensitive data, full system compromise, or disruption of business operations.

Technologies: [Adobe InDesign](https://junglewise.ai/threats/technologies/indesign). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-34627 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34627 being exploited in the wild.

**How severe is CVE-2026-34627?** High severity, with a CVSS score of 7.8, published 14 April 2026.

**Which products and versions are affected?** Adobe InDesign 20.5.2, 21.2 and earlier.

**Is there a fix for CVE-2026-34627?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-34627 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34627?** Check whether you run Adobe InDesign at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow (CWE-122) exists in Adobe InDesign Desktop versions 20.5.2, 21.2, and earlier. The vulnerability is triggered when the application fails to properly validate input while parsing a malicious file, leading to memory corruption. An attacker can exploit this by convincing a user to open a specially crafted document, potentially resulting in arbitrary code execution in the context of the current user. The attack vector is local (AV:L) and requires user interaction (UI:R). Adobe has addressed this in newer versions (20.5.3 and 21.3).

## Affected products

- Adobe InDesign Desktop 20.5.2, 21.2 and earlier

## Timeline

- 2026-04-14: advisory: Initial advisory published by Adobe and NVD
- 2026-04-14: disclosed

## References

- [https://helpx.adobe.com/security/products/indesign/apsb26-32.html](https://helpx.adobe.com/security/products/indesign/apsb26-32.html)

## Related threats

- [Adobe InDesign out-of-bounds write in Desktop application](https://junglewise.ai/threats/cve-2026-48293-adobe-indesign-out-of-bounds-write-in-desktop-application)
- [Adobe InDesign out-of-bounds read in Desktop application](https://junglewise.ai/threats/cve-2026-34705-adobe-indesign-out-of-bounds-read-in-desktop-application)
- [Adobe InDesign NULL Pointer Dereference denial-of-service](https://junglewise.ai/threats/cve-2026-34704-adobe-indesign-null-pointer-dereference-denial-of-service)
- [Adobe InDesign NULL Pointer Dereference vulnerability](https://junglewise.ai/threats/cve-2026-34703-adobe-indesign-null-pointer-dereference-vulnerability)
- [Adobe InDesign stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-34702-adobe-indesign-stack-based-buffer-overflow)