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Vulnerabilities

Vulnerability · CVE-2026-3805

When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

Published Mar 11, 2026 · catalog updated Oct 18, 2026 · When doing a second

Check if you run it

No confirmed exploitation is on record for CVE-2026-3805. EPSS is 0.99%. Act only if a listed version of When doing a second is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (When doing a second).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.99%
Remediation
Advisory link
Affected products
Alpine:v3.21 curl · Alpine:v3.22 curl · Alpine:v3.23 curl · Alpine:v3.24 curl · cpe haxx/curl

When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.21 curl8.13.0 → 8.14.1-r3
  • Alpine:v3.22 curl8.13.0 → 8.14.1-r4
  • Alpine:v3.23 curl8.13.0 → 8.19.0-r0
  • Alpine:v3.24 curl8.13.0 → 8.19.0-r0
  • cpe haxx/curlversion unspecified

How to fix CVE-2026-3805

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3805. EPSS is 0.99%. Act only if a listed version of When doing a second is installed.

Which versions are affected?

Compare what you have installed with 8.13.0 → 8.14.1-r3, 8.13.0 → 8.14.1-r4, 8.13.0 → 8.19.0-r0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 0.99%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 11, 2026 · NIST NVD

    Detected

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

  2. Sep 14, 2026 · NIST NVD

    Updated

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

  3. Oct 18, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 8.14.1-r3; curl fixed in 8.14.1-r4; curl fixed in 8.19.0-r0; curl fixed in 8.19.0-r0

  4. Oct 18, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 8.14.1-r3

  5. Oct 18, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 8.14.1-r4

  6. Oct 18, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 8.19.0-r0

  7. Oct 18, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

Sources

  • CVE.orgVulnerability recordCVE-2026-3805

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3805

    30-day exploitation probability 1.0%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3805

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2026-3805
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2026-3805

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.