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CVE-2026-107929VulnerabilityPublished Updated

curl · When CURLOPT_INTERFACE (or the command line tool's --interface option) is set with one of the documented prefixes

Affects curlSource GCVE Database

0
Authoritative record:CVE-2026-107929· Medium

Not known to be exploited · fixed in 8.20.0-2ubuntu11.1 : update curl when convenient.

Data as of 28 Oct 2026, 22:31 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in 8.20.0-2ubuntu11.1, 8.18.0-1ubuntu2.8

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the Ubuntu curl to 8.20.0-2ubuntu11.1 (package) or 8.18.0-1ubuntu2.8 (package).

Affected software

ProductAffectedFixed in
Ubuntu 26.10curlpkg:deb/ubuntu/curl?arch=source&distro=stonkingOther threatsAffected
  • <8.20.0-2ubuntu11.1
Fixed in
  • 8.20.0-2ubuntu11.1
Ubuntu 26.04 LTScurlpkg:deb/ubuntu/curl?arch=source&distro=resoluteOther threatsAffected
  • <8.18.0-1ubuntu2.8
Fixed in
  • 8.18.0-1ubuntu2.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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

References

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