# CVE-2026-123263: Adobe After Effects heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-123263-after-effects-is-affected-by-a-heap-based-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-123263 · Severity: high · CVSS 7.8 · Published 2026-11-10

Adobe After Effects, a professional video and motion graphics editing application, contains a heap-based buffer overflow vulnerability that could allow an attacker to execute arbitrary code. An attacker would need to trick a user into opening a specially crafted file. Successful exploitation could result in complete system compromise under the privileges of the user running After Effects.

Technologies: [Adobe After Effects](https://junglewise.ai/threats/technologies/after-effects). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-123263 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123263 being exploited in the wild.

**How severe is CVE-2026-123263?** High severity, with a CVSS score of 7.8, published 10 November 2026.

**Which products and versions are affected?** Adobe After Effects 26.5 and earlier.

**Is there a fix for CVE-2026-123263?** Yes: fixed in After Effects 27.0, 26.5.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-123263 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-123263?** Check whether you run Adobe After Effects 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.

## How to fix

- Fixed in After Effects 27.0, 26.5.3

## Technical details

This is a heap-based buffer overflow (CWE-122) in Adobe After Effects that allows arbitrary code execution when a victim opens a malicious file. The vulnerability requires local access and user interaction to open the malicious file, but no elevated privileges are required. The attack vector is local with user interaction, allowing an attacker to execute code in the context of the current user.

## Affected products

- Adobe After Effects 26.5 and earlier

## Timeline

- 2026-11-10: disclosed

## References

- [https://www.adobe.com/trust/security/products/after-effects/apsb26-100.html](https://www.adobe.com/trust/security/products/after-effects/apsb26-100.html)

## Related threats

- [Adobe After Effects out-of-bounds write vulnerability](https://junglewise.ai/threats/cve-2026-113538-after-effects-is-affected-by-an-out-of-bounds-write)
- [Adobe After Effects out-of-bounds write arbitrary code execution](https://junglewise.ai/threats/cve-2026-113536-after-effects-is-affected-by-an-out-of-bounds-write)
- [Adobe After Effects improper input validation arbitrary code execution](https://junglewise.ai/threats/cve-2026-113534-after-effects-is-affected-by-an-improper-input-validation)
- [Adobe After Effects path traversal in file handling](https://junglewise.ai/threats/cve-2026-113532-after-effects-is-affected-by-an-improper-limitation-of-a)
- [Adobe After Effects out-of-bounds write in memory parsing](https://junglewise.ai/threats/cve-2026-113530-after-effects-is-affected-by-an-out-of-bounds-write)