# CVE-2026-115971: Travisun Opptrix denial of service in webhook handler

Source: https://junglewise.ai/threats/cve-2026-115971-a-vulnerability-was-found-in-travisun-opptrix-0-4-0-affected-is  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-24. Updated: 2026-10-24  
License: CC BY 4.0 with a link back

CVE-2026-115971 · Severity: medium · CVSS 5.3 · Published 2026-10-24

Travisun Opptrix is a development tool that processes webhook requests. A flaw in its webhook parsing component allows remote attackers to crash the application without authentication, causing service unavailability. The project is no longer maintained and has been deprecated by its creator.

Technologies: [Travisun Opptrix](https://junglewise.ai/threats/technologies/opptrix). Vendors: [Travisun](https://junglewise.ai/threats/vendors/travisun).

## Quick answers

**Is CVE-2026-115971 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-115971 being exploited in the wild.

**How severe is CVE-2026-115971?** Medium severity, with a CVSS score of 5.3, published 24 October 2026.

**Which products and versions are affected?** Travisun Opptrix 0.4.0.

**Is there a fix for CVE-2026-115971?** 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-2026-115971 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-115971?** Check whether you run Travisun Opptrix 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 Buffer.concat function within the /api/channels/webhook/ endpoint's preParsing handler, allowing remote denial-of-service attacks without requiring authentication. The flaw was a design issue present in version 0.4.0 during early development, later patched in the private GitHub repository. The attack requires only network access to the affected endpoint.

## Affected products

- Travisun Opptrix 0.4.0

## Timeline

- 2026-10-24: disclosed

## References

- [https://drive.google.com/drive/folders/1-crbh2joNwFbpXSQ4Iz1U0dSPy4ZTSf_?usp=sharing](https://drive.google.com/drive/folders/1-crbh2joNwFbpXSQ4Iz1U0dSPy4ZTSf_?usp=sharing)
- [https://vuldb.com/cve/CVE-2026-115971](https://vuldb.com/cve/CVE-2026-115971)

## Related threats

- [Travisun Opptrix code injection in system update import](https://junglewise.ai/threats/cve-2026-115970-a-vulnerability-has-been-found-in-travisun-opptrix-0-4-0-this)
- [Travisun Opptrix command injection in Schedule API](https://junglewise.ai/threats/cve-2026-115969-a-flaw-has-been-found-in-travisun-opptrix-0-4-0-this-affects-an)