url.cpp in libproxy through 0.4.15 is prone to a buffer overflow when PAC is enabled, as…
Priority MEDIUM 48CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.03556 89th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libproxy_project:libproxy:*:*:*:*:*:*:*:* | up to 0.4.15 | Vulnerable | Libproxy Project |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
- cpe:2.3:a:libproxy_project:libproxy:*:*:*:*:*:*:*:* Versions up to 0.4.15 Vulnerable ·Libproxy Project
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
Remediation
Red Hat 1 advisory
- RHSA-2024:6205 Released 2024-09-03 · Red Hat rating Moderatelibproxy security update
- Red Hat CodeReady Linux Builder EUS (v.8.8) libproxy-devel-0.4.15-5.4.el8_8
- Red Hat Enterprise Linux AppStream EUS (v.8.8) libproxy-bin-0.4.15-5.4.el8_8, libproxy-gnome-0.4.15-5.4.el8_8, libproxy-networkmanager-0.4.15-5.4.el8_8 +1
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) libproxy-0.4.15-5.4.el8_8, python3-libproxy-0.4.15-5.4.el8_8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:6205 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | — |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:6205 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | — |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2024:6205 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | — |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26154
- 2026-10-03 Alias added: GHSA-49gc-vgp4-6qhm
References
Sources
- CVE-2020-26154 · CVE Program
- CVE-2020-26154 · NVD
- FIRST EPSS
- GHSA-49gc-vgp4-6qhm · GitHub Advisory Database · CC BY 4.0
- CVE-2020-26154 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences