# CVE-2023-49606: tinyproxy: A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0

CVE-2023-49606 is fixed in 2 products on 1 platform, first by tinyproxy 1.8.4-5ubuntu0.1~esm3, released May 1, 2024. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-49606
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.6308
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tinyproxy Debian 12.15 (bookworm) | 1.11.1-2.1+deb12u1 | [DSA-5705-1](https://patchblox.com/security/data/fix/linux/dsa-5705-1.md) | Jun 5, 2024 |
| Linux | tinyproxy Debian 13.5 (trixie) | 1.11.1-4 | [DEBIAN-CVE-2023-49606](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49606.md) | May 1, 2024 |
| Linux | tinyproxy Debian 14 | 1.11.1-4 | [DEBIAN-CVE-2023-49606](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49606.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 18.04.6 LTS (bionic) | 1.8.4-5ubuntu0.1~esm3 | [tinyproxy 1.8.4-5ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tinyproxy-1.8.4-5ubuntu0.1-esm3.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 20.04 LTS (focal) | 1.10.0-4ubuntu0.2 | [tinyproxy 1.10.0-4ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tinyproxy-1.10.0-4ubuntu0.2.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 22.04.1 LTS (jammy) | 1.11.0-1ubuntu0.1~esm2 | [tinyproxy 1.11.0-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tinyproxy-1.11.0-1ubuntu0.1-esm2.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 24.04.5 LTS (noble) | 1.11.1-3ubuntu0.1 | [tinyproxy 1.11.1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-tinyproxy-1.11.1-3ubuntu0.1.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 24.10 (oracular) | 1.11.2-1 | [tinyproxy 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-tinyproxy-1.11.2-1.md) | Jan 16, 2026 |
| Linux | tinyproxy Ubuntu 25.04 (plucky) | 1.11.2-1 | [tinyproxy 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-tinyproxy-1.11.2-1.md) | Jan 16, 2026 |
| Linux | tinyproxy Ubuntu 25.10 (questing) | 1.11.2-1 | [tinyproxy 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-tinyproxy-1.11.2-1.md) | May 1, 2024 |
| Linux | tinyproxy Ubuntu 26.04.1 LTS (resolute) | 1.11.2-1 | [tinyproxy 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-tinyproxy-1.11.2-1.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 18.04.6 LTS (bionic) | 1.8.4-5ubuntu0.1~esm3 | [tinyproxy-bin 1.8.4-5ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tinyproxy-bin-1.8.4-5ubuntu0.1-esm3.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 20.04 LTS (focal) | 1.10.0-4ubuntu0.2 | [tinyproxy-bin 1.10.0-4ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tinyproxy-bin-1.10.0-4ubuntu0.2.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 22.04.1 LTS (jammy) | 1.11.0-1ubuntu0.1~esm2 | [tinyproxy-bin 1.11.0-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tinyproxy-bin-1.11.0-1ubuntu0.1-esm2.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 24.04.5 LTS (noble) | 1.11.1-3ubuntu0.1 | [tinyproxy-bin 1.11.1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-tinyproxy-bin-1.11.1-3ubuntu0.1.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 24.10 (oracular) | 1.11.2-1 | [tinyproxy-bin 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-tinyproxy-bin-1.11.2-1.md) | Jan 16, 2026 |
| Linux | tinyproxy-bin Ubuntu 25.04 (plucky) | 1.11.2-1 | [tinyproxy-bin 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-tinyproxy-bin-1.11.2-1.md) | Jan 16, 2026 |
| Linux | tinyproxy-bin Ubuntu 25.10 (questing) | 1.11.2-1 | [tinyproxy-bin 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-tinyproxy-bin-1.11.2-1.md) | May 1, 2024 |
| Linux | tinyproxy-bin Ubuntu 26.04.1 LTS (resolute) | 1.11.2-1 | [tinyproxy-bin 1.11.2-1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-tinyproxy-bin-1.11.2-1.md) | May 1, 2024 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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