quinn-rs quinn up to 0.11.13 QUIC unwrap uncaught exception

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in quinn-rs quinn up to 0.11.13 and classified as problematic. This impacts the function unwrap of the component QUIC Handler. The manipulation results in uncaught exception. This vulnerability is reported as CVE-2026-31812. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in quinn-rs quinn up to 0.11.13. Affected is the function unwrap of the component QUIC Handler. The manipulation with an unknown input leads to a uncaught exception vulnerability. CWE is classifying the issue as CWE-248. An exception is thrown from a function, but it is not caught. This is going to have an impact on availability. CVE summarizes:

Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-31812 since 03/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 301791 (Linux Distros Unpatched Vulnerability : CVE-2026-31812), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.11.14 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (301791). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uncaught exception
CWE: CWE-248
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301791
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-31812

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: quinn 0.11.14

Timelineinfo

03/09/2026 CVE reserved
03/10/2026 +1 days Advisory disclosed
03/10/2026 +0 days VulDB entry created
03/16/2026 +6 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-6xvm-j4wr-6v98
Status: Confirmed

CVE: CVE-2026-31812 (🔒)
GCVE (CVE): GCVE-0-2026-31812
GCVE (VulDB): GCVE-100-350172

Entryinfo

Created: 03/10/2026 23:55
Updated: 03/16/2026 04:49
Changes: 03/10/2026 23:55 (68), 03/11/2026 15:49 (2), 03/16/2026 04:49 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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