CVE-2026-53525

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Source
https://cve.org/CVERecord?id=CVE-2026-53525
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53525.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53525
Aliases
  • GHSA-vhv8-g2r9-cwcc
Downstream
Related
Published
2026-08-21T22:19:21.278Z
Modified
2026-08-23T18:50:35.992177160Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
Summary
WeeChat has Non-Constant-Time Password Hash Comparison in Relay Authentication
Details

WeeChat (Wee Enhanced Environment for Chat) is a free chat client. In versions 0.3.1 through 4.9.0, the WeeChat relay authentication uses non-constant-time string comparison functions (weechat_strcasecmp and strcmp) to verify password hashes and plaintext passwords. An attacker can exploit timing differences to extract the server-computed hash character by character, then authenticate using the correct hash without knowing the password. Version 4.9.1 fixes the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-208"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53525.json"
}
References

Affected packages

Git / github.com/weechat/weechat

Affected ranges

Type
GIT
Repo
https://github.com/weechat/weechat
Events
Introduced
0b89084ea4dc5cfe353541a41059d62b62d8dc84
Fixed
2148829ebe47d8ac2377ef234162bf6b64c5b466
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ],
    "extracted_events": [
        {
            "introduced": "0.3.4"
        },
        {
            "fixed": "4.9.1"
        },
        {
            "introduced": "0.3.1"
        },
        {
            "fixed": "4.9.0"
        }
    ]
}

Affected versions

v0.*
v0.3.4
v0.3.5
v0.3.5-rc1
v0.3.5-rc2
v0.3.5-rc3
v0.3.6
v0.3.6-rc1
v0.3.6-rc2
v0.3.6-rc3
v0.3.7
v0.3.7-rc1
v0.3.7-rc2
v0.3.7-rc3
v0.3.8
v0.3.8-rc1
v0.3.8-rc2
v0.3.9
v0.3.9-rc1
v0.3.9-rc2
v0.4.0
v0.4.0-rc1
v0.4.0-rc2
v0.4.0-rc3
v0.4.1
v0.4.1-rc1
v0.4.1-rc2
v0.4.2
v0.4.2-rc1
v0.4.2-rc2
v0.4.3
v0.4.3-rc1
v0.4.3-rc2
v1.*
v1.0
v1.0-rc1
v1.0-rc2
v1.0-rc3
v1.1
v1.1-rc1
v1.1-rc2
v1.2
v1.2-rc1
v1.2-rc2
v1.3
v1.3-rc1
v1.3-rc2
v1.4
v1.4-rc1
v1.4-rc2
v1.5
v1.5-rc1
v1.5-rc2
v1.6
v1.6-rc1
v1.6-rc2
v1.7
v1.7-rc1
v1.7-rc2
v1.8
v1.8-rc1
v1.9
v1.9-rc1
v1.9-rc2
v2.*
v2.0
v2.0-rc1
v2.1
v2.1-rc1
v2.2
v2.2-rc1
v2.2-rc2
v2.3
v2.3-rc1
v2.4
v2.4-rc1
v2.5
v2.5-rc1
v2.5-rc2
v2.6
v2.6-rc1
v2.6-rc2
v2.7
v2.7-rc1
v2.8
v2.8-rc1
v2.9
v2.9-rc1
v3.*
v3.0
v3.0-rc1
v3.1
v3.1-rc1
v3.2
v3.2-rc1
v3.3
v3.3-rc1
v3.4
v3.4-rc1
v3.5
v3.5-rc1
v3.6
v3.6-rc1
v3.7
v3.8
v3.8-rc1
v4.*
v4.0.0
v4.0.0-rc1
v4.1.0
v4.2.0
v4.3.0
v4.4.0
v4.5.0
v4.6.0
v4.7.0
v4.8.0
v4.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53525.json"