synced 16 MIN AGO
01 Record

CVE-2026-53718

Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass

MediumPUBLISHEDCNA: GitHub_M
CNA base score6.4 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
View raw JSON

02 Description

Envoy Gateway custom backendRef cross-namespace ReferenceGrant bypass

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.41% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 35.2% of scored records. A rank, not a probability.
NVD base score
6.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-09-25.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-14 20:12Z1 MO AGO
Last updated
2026-09-15 13:55Z1 MO AGO
Reserved
2026-06-10
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 6.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Weaknesses
Data version
5.2
Document digest
5062882f54bac74f04525184bfb12b9443d4de5dcb1f39245acbbe3f3f682f2c

05 Affected products

VendorProductVersionsPlatforms
envoyproxygateway< 1.7.4, >= 1.8.0-rc.0, < 1.8.1—

06 References