Memory Exhaustion Vulnerability in Rekor Software by Sigstore
CVE-2026-48702

7.5HIGH

Key Information:

Vendor

Sigstore

Status
Rekor
Vendor
CVE Published:
13 August 2026

What is CVE-2026-48702?

The Rekor software, designed for supply chain transparency, contains a vulnerability in its handling of APK files. The 'Package.Unmarshal()' function fails to properly limit the size of decompressed data, leading to potential memory exhaustion when processing specially crafted gzip streams. Attackers can exploit this vulnerability through unauthenticated endpoints to trigger excessive memory allocation, resulting in runtime errors or system-wide out-of-memory crashes. Version 1.5.2 addresses this issue, and users are advised to upgrade immediately to mitigate risks.

Affected Version(s)

rekor >= 0.3.0, < 1.5.2

References

https://github.com/sigstore/rekor/security/advisories/GHS...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.