CVE-2006-5178

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 1%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.

CVSS v3
—
EG Score
0.0(none)
EPSS
46.9%
KEV
Not listed

Published

October 10, 2006

Last Modified

April 23, 2026

References (30)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-08 15:09 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
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  1. 2026-06-18 17:49 UTCEPSS rescore
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  22. 2026-06-02 20:10 UTCEPSS rescore
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  24. 2026-06-01 13:49 UTCEPSS rescore
  25. 2026-06-01 13:49 UTCEPSS rescore
  26. 2026-05-31 22:28 UTCEPSS rescore
  27. 2026-05-31 22:28 UTCEPSS rescore
  28. 2026-05-31 06:27 UTCEG score recompute
  29. 2026-05-31 06:27 UTCGHSA enrichment
  30. 2026-05-31 00:13 UTCEPSS rescore
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  43. 2026-05-22 21:15 UTCEPSS rescore
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  46. 2026-05-21 22:38 UTCEPSS rescore
  47. 2026-05-20 22:36 UTCEPSS rescore
  48. 2026-05-20 11:20 UTCEPSS rescore
  49. 2026-05-20 11:20 UTCEPSS rescore
  50. 2026-05-18 21:29 UTCEPSS rescore
  51. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-10557✓ verified
    First seen Dec 19, 2009

    PHP 5.2.12/5.3.1 - 'symlink()' open_basedir Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2006-5178?
CVE-2006-5178 is a none vulnerability published on October 10, 2006. Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the openbasedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the openbasedir check and before the file is opened by the underlying system, as…
When was CVE-2006-5178 disclosed?
CVE-2006-5178 was first published in the National Vulnerability Database on October 10, 2006, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2006-5178 actively exploited?
CVE-2006-5178 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-5178?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-5178, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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