Skip to main content
CVE-2026-92388VulnerabilityPublished Updated

curl · When an FTP wildcard LIST operation fails, libcurl omits the restoration path meant for successful listings, leaving

Affects curlSource GCVE Database

0
Authoritative record:CVE-2026-92388· High

Not known to be exploited · fixed in 7.35.0-1ubuntu2.20+esm24 : patch curl soon.

Data as of 28 Oct 2026, 22:28 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in 7.35.0-1ubuntu2.20+esm24, 7.47.0-1ubuntu2.19+esm21, 7.58.0-2ubuntu3.24+esm15 +5

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 to a fixed release listed under Affected software.

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
Ubuntu 24.04 LTScurlpkg:deb/ubuntu/curl?arch=source&distro=nobleOther threatsAffected
  • <8.5.0-2ubuntu10.16
Fixed in
  • 8.5.0-2ubuntu10.16
Ubuntu 22.04 LTScurlpkg:deb/ubuntu/curl?arch=source&distro=jammyOther threatsAffected
  • <7.81.0-1ubuntu1.30
Fixed in
  • 7.81.0-1ubuntu1.30
Ubuntu Pro 20.04 LTScurlpkg:deb/ubuntu/curl?arch=source&distro=esm-infra/focalOther threatsAffected
  • <7.68.0-1ubuntu2.25+esm10
Fixed in
  • 7.68.0-1ubuntu2.25+esm10
Ubuntu Pro 18.04 LTScurlpkg:deb/ubuntu/curl?arch=source&distro=esm-infra/bionicOther threatsAffected
  • <7.58.0-2ubuntu3.24+esm15
Fixed in
  • 7.58.0-2ubuntu3.24+esm15

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

Description

When an FTP wildcard `LIST` operation fails, libcurl omits the restoration path meant for successful listings, leaving the write callback set to the internal listing parser and the write callback data pointing directly to the easy handle. Subsequent reuse of this handle triggers an immediate crash, and cloning it via `curl_easy_duphandle()` copies this corrupted state into the duplicate. If the original handle is subsequently freed, executing a transfer on the cloned handle causes a heap use-after-free read against the dangling handle reference; alternatively, reusing the original or cloned handle while changing only `CURLOPT_WRITEDATA` (and omitting `CURLOPT_WRITEFUNCTION`) results in type confusion, forcing the internal parser to interpret incoming server response bytes into memory at the application-supplied write data pointer.

References

Community reviews

Loading reviews…