Public proof of conceptFix available

CVE-2023-28465

Q: Is CVE-2023-28465 actively exploited?

A proof-of-concept exploit exists for CVE-2023-28465, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2023-28465?

CVE-2023-28465 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

A public proof of concept exists; no exploitation attested.

Published2023-12-12
Fixed in5.6.106
WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The package-decompression feature in HL7 (Health Level 7) FHIR Core Libraries before 5.6.106 allows attackers to copy arbitrary files to certain directories via directory traversal, if an allowed directory name is a substring of the directory name chosen by the attacker. NOTE: this issue exists because of an incomplete fix for CVE-2023-24057.

Timeline

dates in UTC

2023-12-1217:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-28465?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-28465?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Hapifhir hl7 fhir core

Branch	Affected	Fixed in	Source
5.6	< 5.6.106	5.6.106	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Hapifhir hl7 fhir core to 5.6.106

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedshoucheng3/hapifhir__org_hl7_fhir_core_CVE-2023-28465_5-6-1055

Sources

CISA-ADPSSVC decisionpoc2025-05-27
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.17.52025-05-27
NVDCVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-222025-05-27
NVDweakness (CWE)CWE-22read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2023-12-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-28465?

Is CVE-2023-28465 actively exploited?

A proof-of-concept exploit exists for CVE-2023-28465, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-28465?

CVE-2023-28465 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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