CVE-2026-11856
CVE-2026-11856: 2 tracked advisory records across NetApp, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
NetApp
1 advisory- Advisory severityCritical9.8
Critical [CVE-2026-11856] Libcurl Vulnerability in NetApp Products
NTAP-20260731-0002Source published Source updated
Libcurl versions 7.10.6 prior to 8.21.0 are susceptible to a vulnerability which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- 7.10.6
- 8.21.0
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
Red Hat
1 advisory- Advisory severityMedium6.5
Medium [CVE-2026-11856] Information disclosure via incorrect Digest authentication header reuse
CVE-2026-11856Source published Source updated
Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then changing the origin to a different one (`hostB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Authorization:` header field meant for `hostA`, to `hostB`. A flaw was found in curl. This could lead to unintended information disclosure, potentially allowing an attacker to gain unauthorized access to sensitive data. This Moderate-severity flaw in `libcurl` can lead to information disclosure when an application reuses a `libcurl` handle for transfers to different HTTP origins while using Digest authentication. The vulnerability arises from `libcurl` incorrectly sending the authentication header intended for the initial origin to a…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Hardened Images
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
4 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- curl-0:8.12.1-4.el10_2.6
- curl-main-8.21.0-0.1.hum1
- rust-main-1.96.1-1.hum1
- RHSA-2026:69125
2 more entries in the full advisory.
- Mitigation guidance
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Correct usage of the library: Create a fresh handle for a different origin, or explicitly clear authentication-related state before reuse: ```c // req.A curl = curl_easy_init(); ... curl_easy_cleanup(curl); // req.B curl = curl_easy_init(); ... curl_easy_cleanup(curl); ``` Fixed in libcurl 8.21.0; affected range: 7.10.6 – 8.20.0
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