Vulnerability details
CVE-2026-94265
curl curl
Authorization: Negotiate sent to foreign origin
CVSS 3.1
9.1Critical
Official description
When processing an HTTP redirect to a URL containing userinfo (a `username:password` component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of `--location-trusted`.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| curl | curl | 8.21.0 ≤ v ≤ 8.21.0 | CVEProject cvelistV5 (CNA) |
| curl | curl | 8.22.0 ≤ v ≤ 8.22.0 | CVEProject cvelistV5 (CNA) |
References and advisories
3
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-10-20
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- curl
- Kolun priority
- 28 · Low
Exploit prediction (EPSS)
0.77%
Probability of exploitation in 30 days
55.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-200Exposure of Sensitive Information to an Unauthorized Actor