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CVE-2026-47896

HIGH 8.9

Published 2026-07-03 · Last modified 2026-07-06

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache Lucene.Net (Lucene.Net.Replicator library). This issue affects Apache Lucene.Net.Replicator: from 4.8.0-beta00005 through 4.8.0-beta00017. Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.

ELEVATED IMPACT

Severe if exploited (CVSS 8.9), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.7%chance of exploitation in 30 days · 49th percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

8.9CVSS 4.0 · HIGH

  • ConfidentialityHigh
  • IntegrityNone
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-47896/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-47896/poc.json

Affected

Vendors Apache Software Foundation Apache

Products Apache Lucene.Net Lucene.Net

Weakness (CWE)

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/AU:Y/RE:L

Known Affected Software Configurations

VendorProductVersion range
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0
ApacheLucene.Net4.8.0

All CVSS metrics

  • HIGH 8.9 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/AU:Y/RE:L
  • HIGH 8.9 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/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:Y/R:X/V:X/RE:L/U:X
  • HIGH 7.5 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Advisories

Sources: NVD · CVE.org · EPSS