Is CVE-2026-9079 in the CISA KEV catalog?

No. CVE-2026-9079 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2026-9079?

CVE-2026-9079 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9079?

Upgrade curl on debian unstable to 8.21.0~rc2-1 or later. Fixes are available for 11 affected products.

CVE & CISA-KEV Catalog

CVE-2026-9079

UNSCORED

NVD

Description

libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the old credentials around to get used for subsequent transfers that should not know nor use them.

How to fix

Remediation Available

curlDebian

Fixed in:8.21.0~rc2-1CVE-2026-9079

curlUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

Fixed in:8.5.0-2ubuntu10.10USN-8487-1

Fixed in:8.14.1-2ubuntu1.4USN-8487-1

libcurl3Ubuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

libcurl3-gnutlsUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

libcurl3-nssUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

libcurl3t64-gnutlsUbuntu

Fixed in:8.5.0-2ubuntu10.10USN-8487-1

Fixed in:8.14.1-2ubuntu1.4USN-8487-1

libcurl4Ubuntu

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

libcurl4-gnutls-devUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

Fixed in:8.5.0-2ubuntu10.10USN-8487-1

Fixed in:8.14.1-2ubuntu1.4USN-8487-1

libcurl4-nss-devUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

libcurl4-openssl-devUbuntu

Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1

Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1

Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1

Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1

Fixed in:7.81.0-1ubuntu1.25USN-8487-1

Fixed in:8.5.0-2ubuntu10.10USN-8487-1

Fixed in:8.14.1-2ubuntu1.4USN-8487-1

libcurl4t64Ubuntu

Fixed in:8.5.0-2ubuntu10.10USN-8487-1

Fixed in:8.14.1-2ubuntu1.4USN-8487-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-03.