Apache APISIX fixes header injection and plaintext log export flaws
Apache disclosed two moderate-severity vulnerabilities in APISIX affecting multiple 2.x and 3.x releases, and urged users to upgrade to version 3.16.0. CVE-2026-31908 affects the forward-auth plugin in certain configurations and allows an attacker to inject malicious headers in APISIX versions 2.12.0 through 3.15.0.
Apache also disclosed CVE-2026-31924, a cleartext transmission flaw in the tencent-cloud-cls log export plugin that sends sensitive information over plaintext HTTP in versions 2.99.0 through 3.15.0. The issues were reported by SeungMyung Lee and Oleh Konko, respectively, and were announced on the oss-sec mailing list by Abhishek Choudhary.

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How this story unfolded
2 events from the most recent confirmed update back to the earliest known activity.
Apache publicly discloses two APISIX vulnerabilities on oss-sec
On the oss-sec mailing list, Abhishek Choudhary disclosed CVE-2026-31908 and CVE-2026-31924 affecting Apache APISIX. CVE-2026-31908 was credited to SeungMyung Lee, while CVE-2026-31924 was credited to Oleh Konko.
Apache APISIX fixes CVE-2026-31908 and CVE-2026-31924 in version 3.16.0
Apache addressed two moderate-severity vulnerabilities in APISIX by recommending an upgrade to version 3.16.0. The flaws affected APISIX versions up to 3.15.0, including a forward-auth header injection issue and plaintext HTTP use in the tencent-cloud-cls log export plugin.
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Sources
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oss-sec: CVE-2026-31924: Apache APISIX: Plugin tencent-cloud-cls log export uses plaintext HTTP
seclists.org
Open sourceoss-sec: CVE-2026-31908: Apache APISIX: forward auth plugin allows header injection
seclists.org
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