# CVE-2026-105163: crossplane crossplane-runtime ImageConfig client.go Get toctou

> A time-of-check time-of-use race condition in the ImageConfig Get function allows remote attackers to bypass security checks.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-92mr-7mjc-w93g, GHSA-mf7q-r4rv-jv94, GO-2026-6302, MINI-3p76-966j-h2pr, MINI-hrhq-x8hw-6xv9

## What is CVE-2026-105163?

CVE-2026-105163 is a medium-severity vulnerability in crossplane-runtime, published on 4 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be launched remotely. Upgrading to version 2.2.3, 2.3.3 and 2.4.0-rc.1 is able to resolve this issue. The patch is identified as bee99c6cd6ca81878acca2940a2f0a02169fc208. You should upgrade the affected component.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition), CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2026-105163?

5 open source packages ship an affected version, including github.com/crossplane/crossplane-runtime/v2.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/crossplane/crossplane-runtime/v2` | Go | From 2.3.0 | 2.3.3, 2.4.0-rc.1 |
| `github.com/crossplane/crossplane-runtime/v2` | Go | From 2.3.0 | 2.3.3 |
| `github.com/crossplane/crossplane-runtime/v2` | Go | From 2.3.0 | 2.3.3 |
| `github.com/crossplane/crossplane-runtime/v2` | Go | From 2.4.0-rc.0 | 2.4.0-rc.1 |
| `github.com/crossplane/crossplane-runtime/v2` | Go | From 2.4.0-rc.0 | 2.4.0-rc.1 |

## How do I fix CVE-2026-105163?

Upgrade github.com/crossplane/crossplane-runtime/v2 to a fixed version for your release line: 2.3.3 or 2.4.0-rc.1.

## Is CVE-2026-105163 being exploited?

There is no known exploitation of CVE-2026-105163 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-105163 and fix it if it is affected.

What it is: CVE-2026-105163 is a medium-severity vulnerability in crossplane-runtime, published on 4 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-105163 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/crossplane/crossplane-runtime/v2 (Go): affected from 2.3.0; fixed in 2.3.3, 2.4.0-rc.1
- github.com/crossplane/crossplane-runtime/v2 (Go): affected from 2.3.0; fixed in 2.3.3
- github.com/crossplane/crossplane-runtime/v2 (Go): affected from 2.3.0; fixed in 2.3.3
- github.com/crossplane/crossplane-runtime/v2 (Go): affected from 2.4.0-rc.0; fixed in 2.4.0-rc.1
- github.com/crossplane/crossplane-runtime/v2 (Go): affected from 2.4.0-rc.0; fixed in 2.4.0-rc.1

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-105163/ (Markdown: https://insights.sbomify.com/CVE-2026-105163/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-105163
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-105163
- OSV: https://osv.dev/vulnerability/CVE-2026-105163

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-105163/
Summaries are generated and may contain mistakes; the official description above is the record.