# CVE-2026-47309: Samsung Escargot uncontrolled recursion in serialized data handling

Source: https://junglewise.ai/threats/cve-2026-47309-samsung-escargot-uncontrolled-recursion-in-serialized-data  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-19. Updated: 2026-05-19  
License: CC BY 4.0 with a link back

CVE-2026-47309 · Severity: medium · CVSS 5.5 · Published 2026-05-19

Samsung Escargot, an open-source JavaScript engine, is vulnerable to a crash when processing specifically crafted, deeply nested data. An attacker could provide a malicious file or payload that causes the application to stop responding or shut down unexpectedly. This primarily impacts the availability of services or devices using this engine, such as smart TVs or appliances.

Technologies: [Samsung Escargot](https://junglewise.ai/threats/technologies/escargot). Vendors: [Samsung](https://junglewise.ai/threats/vendors/samsung).

## Quick answers

**Is CVE-2026-47309 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47309 being exploited in the wild.

**How severe is CVE-2026-47309?** Medium severity, with a CVSS score of 5.5, published 19 May 2026.

**Which products and versions are affected?** Samsung Escargot 590345cc6258317c5da850d846ce6baaf2afc2d3.

**Is there a fix for CVE-2026-47309?** A patch was published on 2026-05-14: Fixes merged into master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-47309 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-47309?** Check whether you run Samsung Escargot 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

An uncontrolled recursion vulnerability (CWE-674) exists in the Samsung Escargot JavaScript engine. The flaw is triggered when the engine processes oversized serialized data payloads, specifically within components like JSON parsing or typed array handling. An attacker can exploit this by providing deeply nested or malformed data that exhausts the stack, leading to a crash. The vulnerability was addressed in pull request #1565, which includes fixes for null pointer dereferences and recursion depth issues in components such as BuiltinTypedArray.cpp and JSON.cpp. Exploitation requires the victim to process a malicious payload (User Interaction required).

## Affected products

- Samsung Escargot 590345cc6258317c5da850d846ce6baaf2afc2d3

## Timeline

- 2026-04-28: other: Fixes submitted via pull request
- 2026-05-14: patched: Fixes merged into master branch
- 2026-05-19: disclosed: CVE published to NVD

## References

- [https://github.com/Samsung/escargot/pull/1565](https://github.com/Samsung/escargot/pull/1565)

## Related threats

- [Samsung Escargot use-after-free in string buffer access](https://junglewise.ai/threats/cve-2026-124684-use-after-free-vulnerability-in-samsung-open-source-escargot)
- [Samsung escargot out-of-bounds write in code cache](https://junglewise.ai/threats/cve-2026-118435-out-of-bounds-write-vulnerability-in-samsung-open-source)
- [Samsung Escargot integer overflow in bytecode cache](https://junglewise.ai/threats/cve-2026-92259-samsung-escargot-integer-overflow-in-bytecode-cache)
- [Samsung Escargot out-of-bounds write in class initialization](https://junglewise.ai/threats/cve-2026-86315-samsung-escargot-out-of-bounds-write-in-class-initialization)
- [Samsung Escargot out-of-bounds read and reachable assertion](https://junglewise.ai/threats/cve-2026-58307-samsung-escargot-out-of-bounds-read-and-reachable-assertion)