CVE-2026-32805 Romeo is vulnerable to Archive Slip due to missing checks in sanitization

High 8.3 Published 18 Mar 2026 Updated 19 Mar 2026

Attackers can exploit a path traversal flaw in Romeo to write files outside the intended directory via crafted tar archives, potentially leading to code execution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-32805?

CVE-2026-32805 is a high-severity path traversal vulnerability in ctfer-io romeo, published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.2, the `sanitizeArchivePath` function in `webserver/api/v1/decoder.go` (lines 80-88) is vulnerable to a path traversal bypass due to a missing trailing path separator in the `strings.HasPrefix` check. A crafted tar archive can write files outside the intended destination directory. Version 0.2.2 fixes the issue.

Weakness: CWE-22

Which versions are affected by CVE-2026-32805?

3 open source packages ship an affected version, including github.com/ctfer-io/romeo/webserver. It affects 1 product.

Package	Affected	Fixed in
`github.com/ctfer-io/romeo/webserver` Go	All versions	`0.2.2`
`github.com/ctfer-io/romeo/webserver` Go	All versions	`0.2.2`
`github.com/ctfer-io/romeo/webserver` Go	All versions	`0.2.2`

Products include Ctfer-Io Romeo.

How do I fix CVE-2026-32805?

Upgrade github.com/ctfer-io/romeo/webserver to 0.2.2 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-32805 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32805 exists.

CVE-2026-32737 Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace High 7.9

Sources

Also known as GHSA-p799-g7vv-f279, GO-2026-4719.