# CVE-2026-7876: IBM Aspera HSTS authentication bypass in CP4I

Source: https://junglewise.ai/threats/cve-2026-7876-ibm-aspera-hsts-authentication-bypass-in-cp4i  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-27. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2026-7876 · Severity: info · CVSS 9.1 · Published 2026-05-27

IBM Aspera High-Speed Transfer Server is a high-performance file transfer solution used to move large data sets across global networks. A security flaw in this product allows unauthorized users to bypass authentication and access files stored on the server. This could lead to the theft or modification of sensitive corporate data and significant operational disruption.

Technologies: [IBM Aspera High-Speed Transfer Server](https://junglewise.ai/threats/technologies/aspera-high-speed-transfer-server). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-7876 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-7876 being exploited in the wild.

**How severe is CVE-2026-7876?** Informational severity, with a CVSS score of 9.1, published 27 May 2026.

**Which products and versions are affected?** IBM Aspera High-Speed Transfer Server 1.5.1 - 1.5.19.

**Is there a fix for CVE-2026-7876?** A patch was published on 2026-05-26: Version 1.5.20 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-7876 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-7876?** Check whether you run IBM Aspera High-Speed Transfer Server 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 authentication bypass vulnerability (CWE-287) exists in IBM Aspera High-Speed Transfer Server (HSTS) for Cloud Pak for Integration (CP4I). The flaw allows a transfer client to bypass security checks and access files in the server's local storage that should otherwise be restricted. The vulnerability is exploitable over the network without authentication (PR:N) or user interaction (UI:N) when specific restriction settings are not in place. Successful exploitation grants the attacker high-impact access to read and modify files (C:H/I:H). The issue is resolved in version 1.5.20.

## Affected products

- IBM Aspera High-Speed Transfer Server for Cloud Pak for Integration (CP4I) 1.5.1 - 1.5.19

## Timeline

- 2026-05-26: advisory: Initial publication by IBM
- 2026-05-26: patched: Version 1.5.20 released
- 2026-05-27: disclosed: NVD publication date

## References

- [https://www.ibm.com/support/pages/node/7274127](https://www.ibm.com/support/pages/node/7274127)

## Related threats

- [IBM Aspera High-Speed Transfer path traversal in asperahttpd](https://junglewise.ai/threats/cve-2026-9035-ibm-aspera-high-speed-transfer-path-traversal-in-asperahttpd)
- [IBM Aspera High-Speed Transfer denial of service in asperahttpd](https://junglewise.ai/threats/cve-2026-8180-ibm-aspera-high-speed-transfer-denial-of-service-in-asperahttpd)
- [IBM Aspera High-Speed Transfer stack overflow in asperahttpd](https://junglewise.ai/threats/cve-2026-8179-ibm-aspera-high-speed-transfer-stack-overflow-in-asperahttpd)
- [IBM Aspera High-Speed Transfer heap overflow in asperahttpd](https://junglewise.ai/threats/cve-2026-8175-ibm-aspera-high-speed-transfer-heap-overflow-in-asperahttpd)