# CVE-2014-0015: Auth bypass in n/a

> Attackers can authenticate as other users by exploiting NTLM connection reuse in libcurl when multiple authentication methods are enabled.

- **Severity:** Medium 4.0 (`AV:N/AC:H/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:** 2 Feb 2014
- **Updated:** 6 Aug 2024
- **Also known as:** CURL-CVE-2014-0015, DEBIAN-CVE-2014-0015, DSA-2849-1, GHSA-93wp-ggwv-r77q

## What is CVE-2014-0015?

CVE-2014-0015 is a medium-severity authentication bypass vulnerability in Haxx Curl, published on 2 Feb 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

cURL and libcurl 7.10.6 through 7.34.0, when more than one authentication method is enabled, re-uses NTLM connections, which might allow context-dependent attackers to authenticate as other users via a request.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2014-0015?

It affects 2 products.


Products: Haxx Curl, Haxx Libcurl.

## How do I fix CVE-2014-0015?

Upgrade to a fixed version.

## Is CVE-2014-0015 being exploited?

There is no known exploitation of CVE-2014-0015 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-2014-0015 and fix it if it is affected.

What it is: CVE-2014-0015 is a medium-severity authentication bypass vulnerability in Haxx Curl, published on 2 Feb 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-2014-0015 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-2014-0015/ (Markdown: https://insights.sbomify.com/CVE-2014-0015/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-0015
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-0015
- OSV: https://osv.dev/vulnerability/CVE-2014-0015

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-0015/
Summaries are generated and may contain mistakes; the official description above is the record.