CVE-2026-24117 is a medium-severity server-side request forgery (SSRF) vulnerability in github.com/sigstore/rekor (go), affecting versions <= 1.4.3. It is fixed in 1.5.0.
Summary /api/v1/index/retrieve supports retrieving a public key via a user-provided URL, allowing attackers to trigger SSRF to arbitrary internal services. 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. Impact SSRF to cloud metadata (169.254.169.254) SSRF to internal Kubernetes APIs SSRF to any service accessible from Fulcio's network Patches Upgrade to v1.5.0. Note that this is a breaking change to the search API and fully disables lookups by URL. If you require this feature, please reach out and we can discuss alternatives. Workarounds Disable the search endpoint with --enableretrieveapi=false.
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
CVE-2026-24117 has a CVSS score of 5.3 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (1.5.0). Upgrading removes the vulnerable code path.
go
github.com/sigstore/rekor (<= 1.4.3)github.com/sigstore/rekor → 1.5.0 (go)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-24117 is reachable in your applications. Explore open-source security for your team.
See if CVE-2026-24117 is reachable in your applications. Get a demo
Already deployed Kodem? See CVE-2026-24117 in your environment →Upgrade github.com/sigstore/rekor to 1.5.0 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-24117 is a medium-severity server-side request forgery (SSRF) vulnerability in github.com/sigstore/rekor (go), affecting versions <= 1.4.3. It is fixed in 1.5.0. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
CVE-2026-24117 has a CVSS score of 5.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
github.com/sigstore/rekor (go) versions <= 1.4.3 is affected.
Yes. CVE-2026-24117 is fixed in 1.5.0. Upgrade to this version or later.
Whether CVE-2026-24117 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade github.com/sigstore/rekor to 1.5.0 or later.