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Vulnerabilities

Vulnerability · CVE-2026-8286

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it

Published Jul 3, 2026 · catalog updated Oct 18, 2026 · Debian Debian

Check if you run it

No confirmed exploitation is on record for CVE-2026-8286. EPSS is 0.31%. Act only if a listed version of Debian Debian is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Advisory link
Affected products
Alpine:v3.21 curl · Alpine:v3.22 curl · Alpine:v3.23 curl · Alpine:v3.24 curl

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

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 curl7.30.0 → 8.14.1-r3
  • Alpine:v3.22 curl7.30.0 → 8.14.1-r4
  • Alpine:v3.23 curl7.30.0 → 8.22.0-r0
  • Alpine:v3.24 curl7.30.0 → 8.21.0-r0

How to fix CVE-2026-8286

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-2026-8286. EPSS is 0.31%. Act only if a listed version of Debian Debian is installed.

Which versions are affected?

Compare what you have installed with 7.30.0 → 8.14.1-r3, 7.30.0 → 8.14.1-r4, 7.30.0 → 8.22.0-r0, 7.30.0 → 8.21.0-r0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian 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 15, 2026 · Debian Security Advisories

    Detected

    [SECURITY] [DSA 6558-1] curl security update

  2. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    curl fixed in 8.14.1-r3; curl fixed in 8.14.1-r4; curl fixed in 8.22.0-r0; curl fixed in 8.21.0-r0

  3. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    curl fixed in 8.14.1-r3

  4. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    curl fixed in 8.14.1-r4

  5. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    curl fixed in 8.22.0-r0

  6. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    curl fixed in 8.21.0-r0

  7. Oct 18, 2026 · Trivy Vulnerability DB

    Updated

    A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

Sources

  • CVE.orgVulnerability recordCVE-2026-8286

    Official CVE identifier

    cve.org
  • Debian Security AdvisoriesVendor advisoryCVE-2026-8286

    [SECURITY] [DSA 6558-1] curl security update

    lists.debian.org
  • FIRST EPSSExploitation probabilityCVE-2026-8286

    30-day exploitation probability 0.3%

    first.org
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2026-8286

    A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

    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.