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01 Record

CVE-2026-71324

Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

HighPUBLISHEDCNA: GitHub_M
CNA base score7.0 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
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02 Description

Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

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.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • 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
1.06% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 64.5% of scored records. A rank, not a probability.
NVD base score
7.0 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Analyzed. NVD last modified this record on 2026-09-16.
Red Hat severity
Important. 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
2026-08-06 15:56Z2 MO AGO
Last updated
2026-08-07 15:43Z2 MO AGO
Reserved
2026-08-05
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.0)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Weaknesses
  • CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base
Data version
5.2
Document digest
5977f1cb3b39ac77d76590c46c0e9fface74714802963f83ccef99a6da1e8ca4

05 Affected products

VendorProductVersionsPlatforms
traefiktraefik< 2.11.53, >= 3.0.0, < 3.6.24, >= 3.7.0, < 3.7.9—

06 References