# CVE-2025-55763: civetweb: Buffer Overflow in the URI parser of CivetWeb 1.14 through 1.16 (latest) allows a remote attacker to achieve remote c...

CVE-2025-55763 is fixed in 2 products on 1 platform, first by civetweb 1.16+dfsg-3, released August 29, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-55763
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0120
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 29, 2025

## Description

Buffer Overflow in the URI parser of CivetWeb 1.14 through 1.16 (latest) allows a remote attacker to achieve remote code execution via a crafted HTTP request. This vulnerability is triggered during request processing and may allow an attacker to corrupt heap memory, potentially leading to denial of service or arbitrary code execution.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | civetweb Debian 13.5 (trixie) | 1.16+dfsg-2+deb13u1 | [DEBIAN-CVE-2025-55763](https://patchblox.com/security/data/fix/linux/debian-cve-2025-55763.md) | Aug 29, 2025 |
| Linux | civetweb Debian 14 | 1.16+dfsg-3 | [DEBIAN-CVE-2025-55763](https://patchblox.com/security/data/fix/linux/debian-cve-2025-55763.md) | Aug 29, 2025 |
| Linux | civetweb Ubuntu 22.04.1 LTS (jammy) | 1.15+dfsg-3ubuntu0.1~esm1 | [civetweb 1.15+dfsg-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-civetweb-1.15-dfsg-3ubuntu0.1-esm1.md) | Sep 29, 2025 |
| Linux | civetweb Ubuntu 24.04.5 LTS (noble) | 1.16+dfsg-1ubuntu0.1 | [civetweb 1.16+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-civetweb-1.16-dfsg-1ubuntu0.1.md) | Sep 29, 2025 |
| Linux | civetweb Ubuntu 26.04.1 LTS (resolute) | 1.16+dfsg-3 | [civetweb 1.16+dfsg-3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-civetweb-1.16-dfsg-3.md) | Aug 29, 2025 |
| Linux | libcivetweb1 Ubuntu 22.04.1 LTS (jammy) | 1.15+dfsg-3ubuntu0.1~esm1 | [libcivetweb1 1.15+dfsg-3ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcivetweb1-1.15-dfsg-3ubuntu0.1-esm1.md) | Sep 29, 2025 |
| Linux | libcivetweb1 Ubuntu 24.04.5 LTS (noble) | 1.16+dfsg-1ubuntu0.1 | [libcivetweb1 1.16+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcivetweb1-1.16-dfsg-1ubuntu0.1.md) | Sep 29, 2025 |
| Linux | libcivetweb1 Ubuntu 26.04.1 LTS (resolute) | 1.16+dfsg-3 | [libcivetweb1 1.16+dfsg-3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libcivetweb1-1.16-dfsg-3.md) | Aug 29, 2025 |

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Data as of 2026-11-09T01:18:40Z 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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