CVE-2026-39998

MEDIUM

CVSS v4.0: 5.8

NetworkNo user interactionImproper Input ValidationVendor advisory ref

Source data as of:

At a glance

Severity
MEDIUM
CVSS
5.8 v4.0 · NVD
EPSS
EPSS not provided by FIRST.org for this CVE
CISA KEV
No
Type
Improper Input Validation · NVD CWE
Attack conditions (CVSS vector)
NetworkNo user interaction · Source: NVD Vector
Published
2026-06-19 · Modified: 2026-06-19
References
Jump to references (2)

CVSS / EPSS / KEV

CVSS v4.0 5.8 / 10 MEDIUM Source: NVD
EPSS — EPSS not provided by FIRST.org for this CVE Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

Improper Input Validation vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers. This issue affects Apache APISIX: from 2.12.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Record details

CVE ID
CVE-2026-39998
CVSS (v4.0)
5.8 (MEDIUM)
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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
CISA KEV
No
Weakness (CWE)
CWE-20
Affected configurations (CPE)
0
Published
2026-06-19
Modified
2026-06-19
Status
Received

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2026-48774 HIGH CVSS 7.5 CVE-2026-32177 HIGH CVSS 7.3 CVE-2026-21768 MEDIUM CVSS 6.3

Published the same year

CVE-2026-35307 CRITICAL CVSS 10.0 CVE-2026-35308 CRITICAL CVSS 10.0 CVE-2026-45480 CRITICAL CVSS 10.0 CVE-2026-46803 CRITICAL CVSS 10.0
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