Vulnerability details
CVE-2026-4700
Red Hat Enterprise Linux 10
Mitigation bypass in the Networking: HTTP component
CVSS 3.1
7.5High
Official description
Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 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:H |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 10 | All | CVEProject cvelistV5 (CNA) |
References and advisories
33- https://bugzilla.mozilla.org/show_bug.cgi?id=2003766
- https://www.mozilla.org/security/advisories/mfsa2026-20/
- https://www.mozilla.org/security/advisories/mfsa2026-22/
- https://www.mozilla.org/security/advisories/mfsa2026-23/
- https://www.mozilla.org/security/advisories/mfsa2026-24/
- https://access.redhat.com/security/cve/CVE-2026-4700 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2450752 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4700.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:8427 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7843 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8315 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:5931 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6342 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:5932 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6917 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7840 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8285 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7858 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8850 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7842 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8289 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7838 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8288 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7839 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8286 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7841 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8287 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7845 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8290 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:7837 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8284 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:5930 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:6188 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-03-24
- Last updated
- 2026-07-15
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.91%
Probability of exploitation in 30 days
60.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-288Authentication Bypass Using an Alternate Path or Channel
- CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')