Apache APISIX: cross-request permission pollution via static permission list mutation

published 2026-10-01 39 d ago modified 2026-10-09 31 d ago also BIT-apisix-2026-82806 , EUVD-2026-90764

cvss: 5.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

Exposure of data element to wrong session vulnerability in Apache APISIX.

This issue affects Apache APISIX: from 2.3.0 before 3.7.0.

Under a supported authz-keycloak configuration, a request's authorization scope could persist into later requests on the same route, leading to unintended authorization expansion and inconsistent access-control decisions.

Users are recommended to upgrade to version 3.7.0 or higher, which fixes the issue.

Patch / fix

fixed in 2

bitnami apisix 3.7.0
Apache Software Foundation Apache APISIX 3.7.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 39 d ago (2026-10-01)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/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:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem	package	affected	fixed in
bitnami	apisix	>=2.3.0, <3.7.0	3.7.0

Affected products

Apache Software Foundation Apache APISIX

Classification

Weakness

CWE-488 Exposure of Data Element to Wrong Session

References

lists.apache.org /thread.html/wvkv2b4oy2fh9v79d30gtsy0bhqmzcdd
vendor-advisory, web
openwall.com /lists/oss-security/2026/10/01/3
web
nvd.nist.gov /vuln/detail/CVE-2026-82806
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary