Description
Rekor is a software supply chain transparency log. In versions 1.4.3 and below, attackers can trigger SSRF to arbitrary internal services because /api/v1/index/retrieve supports retrieving a public key via user-provided URL. Since the SSRF only can trigger GET requests, the request cannot mutate state. The response from the GET request is not returned to the caller so data exfiltration is not possible. A malicious actor could attempt to probe an internal network through Blind SSRF. The issue has been fixed in version 1.5.0. To workaround this issue, disable the search endpoint with --enable_retrieve_api=false.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/sigstore/rekor/security/advisories/GHSA-4c4x-jm2x-pf9j
Patch x_refsource_misc
https://github.com/sigstore/rekor/commit/60ef2bceba192c5bf9327d003bceea8bf1f8275f
Product, Release Notes x_refsource_misc
https://github.com/sigstore/rekor/releases/tag/v1.5.0
Scores
CVSS v3
5.3
EPSS
0.0001
EPSS Percentile
2.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
linuxfoundation/rekor
< 1.5.0
sigstore/rekor
0 - 1.5.0Go
Published
Jan 22, 2026
Tracked Since
Feb 18, 2026