Detections
Analytics

SCA: security update for github.com/quic-go/webtransport-go (GHSA-g6x7-jq8p-6q9q)

high Tenable Cloud Security Plugin ID 437715

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - webtransport-go is an implementation of the WebTransport protocol. From 0.3.0 to 0.9.0, an attacker can
 cause excessive memory consumption in webtransport-go's session implementation by sending a
 WT_CLOSE_SESSION capsule containing an excessively large Application Error Message. The implementation
 does not enforce the draft-mandated limit of 1024 bytes on this field, allowing a peer to send an
 arbitrarily large message payload that is fully read and stored in memory. This allows an attacker to
 consume an arbitrary amount of memory. The attacker must transmit the full payload to achieve the memory
 consumption, but the lack of any upper bound makes large-scale attacks feasible given sufficient
 bandwidth. This vulnerability is fixed in 0.10.0. (CVE-2026-21434)

See Also

https://github.com/advisories/GHSA-g6x7-jq8p-6q9q

Plugin Details

Severity: High

ID: 437715

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 2/13/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-21434

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 2/12/2026

Vulnerability Publication Date: 2/12/2026

Reference Information

CVE: CVE-2026-21434

cwe: CWE-770