All vulnerabilities
CVE-2026-107929

curl: local interface connection reuse mixup

curl curlLibraries & packages
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.29%Chance of exploitation activity in the next 30 days, higher than 20% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published20 Oct 2026Updated 20 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

Description

When CURLOPT_INTERFACE (or the command line tool's --interface option) is set with one of the documented prefixes (if!, host!, ifhost!), that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go out from the earlier transfer's source address

Text from CVE List

Affected versions 19

  • curlaffected: 8.22.0 through 8.22.0CVE List
  • curlaffected: 8.21.0 through 8.21.0CVE List
  • curlaffected: 8.20.0 through 8.20.0CVE List
  • curlaffected: 8.19.0 through 8.19.0CVE List
  • curlaffected: 8.18.0 through 8.18.0CVE List
  • curlaffected: 8.17.0 through 8.17.0CVE List
  • curlaffected: 8.16.0 through 8.16.0CVE List
  • curlaffected: 8.15.0 through 8.15.0CVE List
  • curlaffected: 8.14.1 through 8.14.1CVE List
  • curlaffected: 8.14.0 through 8.14.0CVE List
  • curlaffected: 8.13.0 through 8.13.0CVE List
  • curlaffected: 8.12.1 through 8.12.1CVE List
  • curlaffected: 8.12.0 through 8.12.0CVE List
  • curlaffected: 8.11.1 through 8.11.1CVE List
  • curlaffected: 8.11.0 through 8.11.0CVE List
  • curlaffected: 8.10.1 through 8.10.1CVE List
  • curlaffected: 8.10.0 through 8.10.0CVE List
  • curlaffected: 8.9.1 through 8.9.1CVE List
  • curlaffected: 8.9.0 through 8.9.0CVE List

References 3