Description
A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Tinyproxy | Tinyproxy | 1.11.1, Tinyproxy 1.10.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tinyproxy | 1.11.1-4 | — |
| Debian 13 | tinyproxy | 1.11.1-4 | — |
| Debian 12 | tinyproxy | 1.11.1-2.1+deb12u1 | DSA-5705-1 |
| Debian 11 | tinyproxy | 1.10.0-5+deb11u1 | DLA-3892-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | tinyproxy | 1.11.2-1 | — |
| Ubuntu 25.10 | tinyproxy | 1.11.2-1 | — |
| Ubuntu 24.04 LTS | tinyproxy | 1.11.1-3ubuntu0.1 | USN-7190-1 |
| Ubuntu 20.04 LTS | tinyproxy | 1.10.0-4ubuntu0.2 | USN-7190-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | tinyproxy | 1.11.0-1ubuntu0.1~esm2 | USN-7190-1 |
| Ubuntu Pro 18.04 LTS | tinyproxy | 1.8.4-5ubuntu0.1~esm3 | USN-7190-1 |
| Ubuntu Pro 16.04 LTS | tinyproxy | 1.8.3-3ubuntu16.04.1~esm3 | USN-7190-1 |
| Ubuntu Pro 14.04 LTS | tinyproxy | 1.8.3-3ubuntu14.04.1~esm3 | USN-7190-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP5 | tinyproxy | 1.11.2-bp155.3.3.1 | openSUSE-SU-2024:0119-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tinyproxy | 1.11.2-1.1 | openSUSE-SU-2024:13943-1 |
| openSUSE Leap 15.5 | tinyproxy | 1.11.2-bp155.3.3.1 | openSUSE-SU-2024:0119-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.23 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.22 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.21 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.20 | tinyproxy | 1.11.2-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.18 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.17 | tinyproxy | 1.11.2-r0 | — |
| Alpine v3.16 | tinyproxy | 1.11.2-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
d0rb/CVE-2023-49606 ★ 4 · May 7, 2024
Critical use-after-free vulnerability discovered in Tinyproxy
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Tinyproxy < 1.11.2 - Use After Free in HTTP Connection Header http/cves/2023/CVE-2023-49606.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Advisories 6
- USN-7190-1 tinyproxy vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5705-1 tinyproxy - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3892-1 tinyproxy - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:13943-1 tinyproxy-1.11.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:0119-1 Security update for tinyproxy SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0997 Tinyproxy: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 7, 2025