What’s Vulnerable › Vulnerabilities

CVE-2020-26154

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-30 · updated 2026-06-17
• Weakness: CWE-120

Description

url.cpp in libproxy through 0.4.15 is prone to a buffer overflow when PAC is enabled, as demonstrated by a large PAC file that is delivered without a Content-length header.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 32, 33
• Libproxy Project Libproxy: through 0.4.15
• openSUSE Leap: 15.1, 15.2

References

• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html
• https://bugs.debian.org/968366
• https://github.com/libproxy/libproxy/pull/126
• https://lists.debian.org/debian-lts-announce/2020/11/msg00024.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BID3HVHAF6DA3YJOFDBSAZSMR3ODNIW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WZVZXTFMFTSML3J6OOCDBDYH474BRJSW/
• https://www.debian.org/security/2020/dsa-4800
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html
• https://bugs.debian.org/968366
• https://github.com/libproxy/libproxy/pull/126

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