CVE-2026-101991
Junos OS and Junos OS Evolved: A BGP-LS peer causes heap data disclosure when traffic-engineering routing is enabled
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured BGP-LS peer to cause heap data disclosure via a malformed UPDATE sent over a session with the traffic-engineering address family enabled.
| CWE | CWE-130 |
| Vendor | juniper networks |
| Product | junos os |
| Published | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Juniper Networks / Junos OS
0 < 23.2R2-S7.7 23.4 < 23.4R2-S8.13 24.2 < 24.2R2-S5.5 24.4 < 24.4R2-S5 25.2 < 25.2R2-S2 25.4 < 25.4R1-S3 26.2 < 26.2R1-S2
Juniper Networks / Junos OS Evolved
0 < 23.2R2-S7.7-EVO 23.4 < 23.4R2-S8.11-EVO 24.2 < 24.2R2-S5.6-EVO 24.4 < 24.4R2-S5-EVO 25.2 < 25.2R2-S2-EVO 25.4 < 25.4R1-S3-EVO 26.2 < 26.2R1-S2-EVO 23.4X100 25.2X100 < 25.2X100-D35-EVO 25.4X300 < 25.4X300-D40-EVO