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EPSS 0.3%top 83%

Weechat: [GHSA-vhv8-g2r9-cwcc: Non-Constant-Time Password Hash Comparison in Relay Authentication] (CVE-2026-53525)

0
Medium
Published: 08/19/2026 (08/19/2026, 00:00:00 UTC)
Source: GCVE Database
Product: weechat

Description

A vulnerability in Weechat's relay authentication mechanism involves a non-constant-time password hash comparison. This timing discrepancy could potentially allow an attacker to infer password information. The issue affects multiple specific versions of Weechat. The CVSS 3.1 score is 7.4, indicating a medium severity vulnerability with network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality impact, but high integrity and availability impacts.

CVSS v3.1

Score 7.4high

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected software

Ubuntu:Pro:16.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=esm-apps/xenial
Affected versions
=1.3-1=1.3-1build1=1.4-1=1.4-1build1=1.4-1build2=1.4-2=1.4-2ubuntu0.1=1.4-2ubuntu0.1+esm1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=esm-apps/bionic
Affected versions
=1.9.1-1=1.9.1-1build1=1.9.1-1ubuntu1=1.9.1-1ubuntu1+esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=esm-apps/focal
Affected versions
=2.6-2=2.6-2build1=2.6-2build2=2.6-2ubuntu1=2.6-2ubuntu2=2.8-1=2.8-1ubuntu0.1~esm1
Ubuntu:22.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=jammy
Affected versions
=3.3-1=3.3-1ubuntu1=3.4-2=3.4-2build1=3.4-2build2=3.4.1-1=3.5-1
Ubuntu:24.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=noble
Affected versions
=4.0.5-1=4.1.1-1=4.1.1-1build2=4.1.1-1build3=4.1.1-1build6=4.1.1-1build7
Ubuntu:26.04:LTSmore threats →ghsa
weechat
pkg:deb/ubuntu/weechat?arch=source&distro=resolute
Affected versions
=4.6.3-1build1=4.7.2-1=4.8.1-1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/24/2026, 14:09:54 UTC

Technical Analysis

CVE-2026-53525 describes a vulnerability in Weechat where the password hash comparison during relay authentication is not performed in constant time. This flaw can lead to timing side-channel attacks that may allow an attacker to compromise the integrity and availability of the affected system. The vulnerability affects numerous specific Weechat versions as listed. There is no information about known exploits in the wild or vendor-provided patches. The CVSS 3.1 vector indicates the attack requires network access with high complexity and no privileges or user interaction, impacting integrity and availability but not confidentiality.

Potential Impact

The vulnerability allows an attacker to exploit timing differences in password hash comparison, potentially leading to unauthorized actions that compromise the integrity and availability of the Weechat service. Confidentiality is not impacted. No known exploits have been reported in the wild.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fixes or patches are provided in the available data. Users should monitor vendor communications for updates and consider restricting network access to the relay authentication feature as a precaution.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-53525
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
3.1

Threat ID: 6a8c4c58acd9273b499bedc1

Added to database: 08/24/2026, 13:51:20 UTC

Last enriched: 08/24/2026, 14:09:54 UTC

Last updated: 08/24/2026, 22:52:12 UTC

Views: 2

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