ZDF
Sign inSign up

Vulnerabilities

Vulnerability · USN-8932-1

curl vulnerabilities

Published Oct 14, 2026 · catalog updated Oct 17, 2026 · curl vulnerabilities

Open the advisory

Exploitation likelihood is not on this record for USN-8932-1. A missing EPSS score is not a low risk. Compare curl vulnerabilities with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (curl vulnerabilities).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
Ubuntu:22.04:LTS curl · Ubuntu:24.04:LTS curl · Ubuntu:Pro:14.04:LTS curl · Ubuntu:Pro:16.04:LTS curl · Ubuntu:Pro:18.04:LTS curl · Ubuntu:Pro:20.04:LTS curl

Stanislav Fort discovered that curl did not properly clear AWS SigV4 authentication state when CURLOPT_AWS_SIGV4 was set to NULL. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-86409) Stanislav Fort discovered that an HTTP proxy could trick libcurl into sending credentials to the proxy itself by responding to a CONNECT request with an unexpected authentication challenge. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-86414) Stanislav Fort discovered that curl did not correctly handle HSTS entries when an includeSubDomains parent entry was imported before a longer-lived child entry. An attacker could possibly use this issue to cause curl to use unencrypted HTTP connections. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-87862) Stanislav Fort discovered that curl did not properly handle HSTS max-age values that exceeded calendar time structure bounds. An attacker could possibly use this issue to cause a denial of service or data loss. This issue only affected Ubuntu 24.04 LTS. (CVE-2026-87863) Stanislav Fort discovered that curl did not properly handle IMAP APPEND commands when CURLOPT_CRLF was enabled, allowing overflow bytes to be interpreted as pipelined commands. An authenticated attacker could possibly use this issue to inject arbitrary IMAP commands. (CVE-2026-87864) Joshua Rogers discovered that libcurl had a use-after-free vulnerability in the FTP wildcard matching code. An attacker could possibly use this issue to cause curl to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-92388) Joshua Rogers discovered that libcurl's TFTP state machine did not properly validate transfer directions, allowing a malicious server to force the client into transmit mode. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-92389) Joshua Rogers discovere

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.

  • Ubuntu:22.04:LTS curl0 → 7.81.0-1ubuntu1.30
  • Ubuntu:24.04:LTS curl0 → 8.5.0-2ubuntu10.16
  • Ubuntu:Pro:14.04:LTS curl0 → 7.35.0-1ubuntu2.20+esm24
  • Ubuntu:Pro:16.04:LTS curl0 → 7.47.0-1ubuntu2.19+esm21
  • Ubuntu:Pro:18.04:LTS curl0 → 7.58.0-2ubuntu3.24+esm15
  • Ubuntu:Pro:20.04:LTS curl0 → 7.68.0-1ubuntu2.25+esm10

How to fix USN-8932-1

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

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

Should you patch?

Exploitation likelihood is not on this record for USN-8932-1. A missing EPSS score is not a low risk. Compare curl vulnerabilities with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 7.81.0-1ubuntu1.30, 0 → 8.5.0-2ubuntu10.16, 0 → 7.35.0-1ubuntu2.20+esm24, 0 → 7.47.0-1ubuntu2.19+esm21, 0 → 7.58.0-2ubuntu3.24+esm15, 0 → 7.68.0-1ubuntu2.25+esm10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

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. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    Stanislav Fort discovered that curl did not properly clear AWS SigV4 authentication state when CURLOPT_AWS_SIGV4 was set to NULL. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-86409) Stanislav Fort discovered that an HTTP proxy could trick libcurl into sending credentials to the proxy itself by r

  2. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.35.0-1ubuntu2.20+esm24; curl fixed in 7.47.0-1ubuntu2.19+esm21; curl fixed in 7.58.0-2ubuntu3.24+esm15; curl fixed in 7.68.0-1ubuntu2.25+esm10

  3. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.35.0-1ubuntu2.20+esm24

  4. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.47.0-1ubuntu2.19+esm21

  5. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.58.0-2ubuntu3.24+esm15

  6. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.68.0-1ubuntu2.25+esm10

  7. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 7.81.0-1ubuntu1.30

  8. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    curl fixed in 8.5.0-2ubuntu10.16

  9. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    Stanislav Fort discovered that curl did not properly clear AWS SigV4 authentication state when CURLOPT_AWS_SIGV4 was set to NULL. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-86409) Stanislav Fort discovered that an HTTP proxy could trick libcurl into sending credentials to the proxy itself by r

  10. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    Stanislav Fort discovered that curl did not properly clear AWS SigV4 authentication state when CURLOPT_AWS_SIGV4 was set to NULL. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-86409) Stanislav Fort discovered that an HTTP proxy could trick libcurl into sending credentials to the proxy itself by r

Sources

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.