CVE Explorer
CVE-2026-39998
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Apache APISIX","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"3.16.0","status":"affected","version":"2.12.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b4ecbf6909e5914041276a1d715fa235cb9113b905eece40779b7b5fc3450894 · sha256:d230598f3c38eb43… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":5.8,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:b4ecbf6909e5914041276a1d715fa235cb9113b905eece40779b7b5fc3450894 · sha256:d230598f3c38eb43… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:b4ecbf6909e5914041276a1d715fa235cb9113b905eece40779b7b5fc3450894 · sha256:d230598f3c38eb43… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/06/19/4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b4ecbf6909e5914041276a1d715fa235cb9113b905eece40779b7b5fc3450894 · sha256:d230598f3c38eb43… · /containers/adp/0/references/0
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/vgkvy396010d7g6m0jrn4d3hjf2svlvv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b4ecbf6909e5914041276a1d715fa235cb9113b905eece40779b7b5fc3450894 · sha256:d230598f3c38eb43… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.