CVE-2026-55777

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Source
https://cve.org/CVERecord?id=CVE-2026-55777
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55777.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55777
Aliases
  • GHSA-5phr-qpgf-hgrg
Downstream
Published
2026-07-30T20:37:40Z
Modified
2026-10-28T10:52:18Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
GoAccess: Out-of-bounds heap read in parse_ios() via crafted User-Agent leads to remote crash/DoS
Details

GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted User-Agent in a processed access log to read up to approximately 4 KB beyond the heap allocation and conditionally crash GoAccess. This issue is fixed in version 1.11.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55777.json"
}
References

Affected packages

Git / github.com/allinurl/goaccess

Affected ranges

Type
GIT
Repo
https://github.com/allinurl/goaccess
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
615490d44e43544ec778e0841047772d313f14b3
Fixed
ba813ed97d998dbdcb8d87e178799a4bb2da9e81
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.11"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "ba813ed97d998dbdcb8d87e178799a4bb2da9e81"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

Other
list
v0.*
v0.6
v0.8
v1.*
v1.10
v1.10.1
v1.10.2
v1.4
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.5
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.5.6
v1.5.7
v1.6
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.7
v1.7.1
v1.7.2
v1.8
v1.8.1
v1.9
v1.9.1
v1.9.2
v1.9.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55777.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "259694106751180817752874489220024316186",
            "length": 427
        },
        "id": "CVE-2026-55777-9ee483e9",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81",
        "target": {
            "file": "src/opesys.c",
            "function": "parse_ios"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "262058444158249902851174790630391218748",
                "317085133410112339331123141436377758688",
                "77432167615781091938045883110615317906",
                "18815247221543410513439915825559918934"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-55777-d1674b5f",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81",
        "target": {
            "file": "src/opesys.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "48240599272509140524177217664582981722",
                "111427937077305213561267474037295287471",
                "84696669337637875754534043180195581490",
                "5313795016067787971193446244959463772"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-55777-d37fedd3",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/allinurl/goaccess/commit/615490d44e43544ec778e0841047772d313f14b3",
        "target": {
            "file": "src/gstorage.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T10:52:18Z"