cURL and libcurl 7.40.0 through 7.42.1 send the HTTP Basic authentication credentials for…
Priority LOW 33CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
cURL and libcurl 7.40.0 through 7.42.1 send the HTTP Basic authentication credentials for a previous connection when reusing a reset (curl_easy_reset) connection handle to send a request to the same host name, which allows remote attackers to obtain sensitive information via unspecified vectors.
Why it matters now
EPSS 0.07248 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:haxx:curl:7.40.0:*:*:*:*:*:*:* | 7.40.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:curl:7.41.0:*:*:*:*:*:*:* | 7.41.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:curl:7.42.0:*:*:*:*:*:*:* | 7.42.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:curl:7.42.1:*:*:*:*:*:*:* | 7.42.1 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:libcurl:7.40.0:*:*:*:*:*:*:* | 7.40.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:libcurl:7.41.0:*:*:*:*:*:*:* | 7.41.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:libcurl:7.42.0:*:*:*:*:*:*:* | 7.42.0 | Vulnerable | Haxx |
| cpe:2.3:a:haxx:libcurl:7.42.1:*:*:*:*:*:*:* | 7.42.1 | Vulnerable | Haxx |
- cpe:2.3:a:haxx:curl:7.40.0:*:*:*:*:*:*:* Versions 7.40.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:curl:7.41.0:*:*:*:*:*:*:* Versions 7.41.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:curl:7.42.0:*:*:*:*:*:*:* Versions 7.42.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:curl:7.42.1:*:*:*:*:*:*:* Versions 7.42.1 Vulnerable ·Haxx
- cpe:2.3:a:haxx:libcurl:7.40.0:*:*:*:*:*:*:* Versions 7.40.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:libcurl:7.41.0:*:*:*:*:*:*:* Versions 7.41.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:libcurl:7.42.0:*:*:*:*:*:*:* Versions 7.42.0 Vulnerable ·Haxx
- cpe:2.3:a:haxx:libcurl:7.42.1:*:*:*:*:*:*:* Versions 7.42.1 Vulnerable ·Haxx
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Ceph Storage 1.1
- Red Hat Ceph Storage 1.2
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2015-3236
- 2026-10-03 Alias added: GHSA-x247-6f29-259j
References
Patch 2
More Haxx Curl vulnerabilities
- TI-2026-16162 Negotiate ambient user conn reuse CVSS 3.1CRITICAL 9.8
- TI-2026-10231 cross-origin Digest auth state leak CVSS 3.1CRITICAL 9.8
- TI-2026-09063 HTTP/2 stream-dependency tree UAF CVSS 3.1CRITICAL 9.8
- TI-2026-07976 stale proxy password leak CVSS 3.1CRITICAL 9.8
- TI-2026-07845 SASL double-free CVSS 3.1CRITICAL 9.8
- TI-2023-12257 Injection in https://github.com/curl/curl CVSS 3.1CRITICAL 9.8
Sources
- CVE-2015-3236 · CVE Program
- CVE-2015-3236 · NVD
- FIRST EPSS
- GHSA-x247-6f29-259j · GitHub Advisory Database · CC BY 4.0
- CVE-2015-3236 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences