# CVE-2026-37531: Automotive Grade Linux app-framework-main Zip Slip in widget installer

Source: https://junglewise.ai/threats/cve-2026-37531-automotive-grade-linux-app-framework-main-zip-slip-in-widget  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-01. Updated: 2026-05-18  
License: CC BY 4.0 with a link back

CVE-2026-37531 · Severity: critical · CVSS 9.8 · Published 2026-05-01

A vulnerability in the Automotive Grade Linux (AGL) application framework allows attackers to gain full control over the system by installing a malicious widget. The framework fails to properly check the contents of application packages, allowing files to be written to sensitive system locations even if the package's security signature is invalid. This can lead to permanent system compromise, data theft, or complete loss of operational control over the vehicle's software environment.

Technologies: [Linuxfoundation Automotive Grade Linux](https://junglewise.ai/threats/technologies/automotive-grade-linux). Vendors: [Automotive Grade Linux](https://junglewise.ai/threats/vendors/automotive-grade-linux), [Linuxfoundation](https://junglewise.ai/threats/vendors/linuxfoundation).

## Quick answers

**Is CVE-2026-37531 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-37531 being exploited in the wild.

**How severe is CVE-2026-37531?** Critical severity, with a CVSS score of 9.8, published 1 May 2026.

**Which products and versions are affected?** Automotive Grade Linux App-Framework-Main thru 17.1.12.

**Is there a fix for CVE-2026-37531?** 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-2026-37531 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-37531?** Check whether you run Automotive Grade Linux App-Framework-Main or Linuxfoundation Automotive Grade Linux 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

The vulnerability exists in the widget installation flow of AGL's app-framework-main. The 'is_valid_filename' function in 'wgtpkg-zip.c' fails to validate dot-notation directory traversal sequences (../), only blocking absolute paths. During extraction, the 'zread' function uses 'openat' with these unsanitized paths, allowing files to be written outside the intended work directory. Furthermore, a Time-of-Check Time-of-Use (TOCTOU) flaw exists because extraction occurs before signature verification in 'install_widget'. Even if signature verification subsequently fails, the cleanup process only removes the temporary work directory, leaving files written via path traversal permanently on the filesystem. This allows an unauthenticated attacker to achieve arbitrary file write and remote code execution (RCE).

## Affected products

- Automotive Grade Linux (AGL) app-framework-main thru 17.1.12

## Timeline

- 2026-04-30: disclosed: Disclosed by Innora Security Research
- 2026-05-01: advisory: CVE-2026-37531 published

## References

- [https://gerrit.automotivelinux.org/gerrit/src/app-framework-main](https://gerrit.automotivelinux.org/gerrit/src/app-framework-main)
- [https://gist.github.com/sgInnora/8526eedcfd826d05ef1fc45d8f405643](https://gist.github.com/sgInnora/8526eedcfd826d05ef1fc45d8f405643)

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