# CVE-2014-0139: Security feature bypass in n/a

> Man-in-the-middle attackers can spoof SSL servers by exploiting wildcard IP recognition in X.509 certificates when using specific TLS libraries.

- **Severity:** Medium 5.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Apr 2014
- **Updated:** 6 Aug 2024
- **Also known as:** ALPINE-CVE-2014-0139, CLEANSTART-2026-CU80287, CURL-CVE-2014-0139, DEBIAN-CVE-2014-0139, GHSA-vwm2-85hg-5h4q, MGASA-2015-0165, openSUSE-SU-2024:10380-1

## What is CVE-2014-0139?

CVE-2014-0139 is a medium-severity vulnerability in Haxx Curl, published on 15 Apr 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

cURL and libcurl 7.1 before 7.36.0, when using the OpenSSL, axtls, qsossl or gskit libraries for TLS, recognize a wildcard IP address in the subject's Common Name (CN) field of an X.509 certificate, which might allow man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Weakness: CWE-310

## Which versions are affected by CVE-2014-0139?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `lftp` | openSUSE:Tumbleweed | All versions | 4.7.4-1.1 |

Products: Haxx Curl, Haxx Libcurl.

## How do I fix CVE-2014-0139?

Upgrade to a fixed version.

## Is CVE-2014-0139 being exploited?

There is no known exploitation of CVE-2014-0139 in the wild and no public exploit code.

## Other vulnerabilities in Haxx Curl

- [CVE-2026-19931](https://insights.sbomify.com/CVE-2026-19931/): Negotiate ambient user conn reuse (critical 9.8)
- [CVE-2026-10536](https://insights.sbomify.com/CVE-2026-10536/): HTTP/2 stream-dependency tree UAF (critical 9.8)
- [CVE-2026-11856](https://insights.sbomify.com/CVE-2026-11856/): cross-origin Digest auth state leak (critical 9.8)
- [CVE-2026-8925](https://insights.sbomify.com/CVE-2026-8925/): SASL double-free (critical 9.8)
- [CVE-2026-9079](https://insights.sbomify.com/CVE-2026-9079/): stale proxy password leak (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-0139 and fix it if it is affected.

What it is: CVE-2014-0139 is a medium-severity vulnerability in Haxx Curl, published on 15 Apr 2014. 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-2014-0139 in the wild and no public exploit code.

Affected product: Haxx Curl. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2014-0139/ (Markdown: https://insights.sbomify.com/CVE-2014-0139/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-0139
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-0139
- OSV: https://osv.dev/vulnerability/CVE-2014-0139

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-0139/
Summaries are generated and may contain mistakes; the official description above is the record.