CVE-2026-8388
Incorrect boundary conditions in the JavaScript Engine: JIT component
MEDIUM
6.5
CVSS Score
Published: May 12, 2026 at 12:36 PM UTC
Updated: October 26, 2026 at 06:10 PM UTC
2 products affected across 2 vendorsFirefoxEnterprise Linux
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit
Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 150.0.3
Vendor states this is fixed in 115.36 (unaffected)
Vendor states this is fixed in 140.11 (unaffected)
Vendor states this is fixed in 150.0.3 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el10_0 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el10_2 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el7_9 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el8_10 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el8_4 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el8_6 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el8_8 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el9_2 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el9_4 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el9_6 (unaffected)
Vendor states this is fixed in 0:140.11.0-1.el9_8 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (29)
Source: cverecord
https://www.mozilla.org/security/advisories/mfsa2026-47/Source: cverecord
https://www.mozilla.org/security/advisories/mfsa2026-48/Source: cverecord
https://www.mozilla.org/security/advisories/mfsa2026-51/Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:21378Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:21380Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:21381SSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
6.5MEDIUMCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-119CWE-787
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