CVE-2026-47729
Publication date 12 June 2026
Last updated 7 August 2026
Ubuntu priority
Description
Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB directory-listing formats is not followed by a filename, parsing was not restricted to the input buffer, so a trusted client accessing a misbehaving FTP server through Squid's gateway feature could read memory from random unrelated transactions. This issue is fixed in version 7.6.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| squid | 26.10 stonking |
Not affected
|
| 26.04 LTS resolute |
Fixed in 7.2-2ubuntu2.2
|
|
| 24.04 LTS noble |
Fixed in 6.14-0ubuntu0.24.04.4
|
|
| 22.04 LTS jammy |
Fixed in 5.9-0ubuntu0.22.04.7
|
|
| 20.04 LTS focal |
Vulnerable
|
|
| squid3 | 26.10 stonking | Not in release |
| 26.04 LTS resolute | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 18.04 LTS bionic |
Vulnerable
|
|
| 16.04 LTS xenial |
Vulnerable
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.5 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8941-1
- Squid vulnerabilities
- 20 October 2026