Critical severity · published Sep 30, 2020
CVE-2020-26154
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
9.8
CVSS
3.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.6% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
FE
Fedora · Fedoraproject
32; 33 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
LI
Libproxy · Libproxy Project
through 0.4.15 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26154
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-26154
Issue Tracking
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00030.html
Issue Tracking
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00033.html
Issue Tracking
https://bugs.debian.org/968366
Third Party Advisory
https://github.com/libproxy/libproxy/pull/126
Mailing List
https://lists.debian.org/debian-lts-announce/2020/11/msg00024.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BID3HVHAF6DA3YJOFDBSAZSMR3ODNIW/
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-24061
GNU InetUtils Argument Injection Vulnerability