How severe is CVE-2026-49872?

CVE-2026-49872 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-49872 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49872?

CVE-2026-49872 affects Apache Apisix. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49872?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-49872 have an EU (EUVD) identifier?

Yes. CVE-2026-49872 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38026.

When was CVE-2026-49872 published?

CVE-2026-49872 was published on 2026-06-19 and last updated on 2026-06-23.

CVE-2026-49872

CVE-2026-49872 is a high-severity vulnerability in Apache Apisix with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 5.3
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38026
Weakness: CWE-287
Affected product: Apache Apisix
Published: 2026-06-19
Last modified: 2026-06-23

Description

Improper Authentication vulnerability in Apache APISIX. When the cas-auth plugin is used in a route, an attacker can possibly authenticate itself with credentials from a different source. This issue affects Apache APISIX: from 3.0.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Frequently asked questions

What is CVE-2026-49872?: Improper Authentication vulnerability in Apache APISIX. When the cas-auth plugin is used in a route, an attacker can possibly authenticate itself with credentials from a different source. This issue affects Apache APISIX: from 3.0.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.
How severe is CVE-2026-49872?: CVE-2026-49872 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-49872 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49872?: CVE-2026-49872 affects Apache Apisix. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49872?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-49872 have an EU (EUVD) identifier?: Yes. CVE-2026-49872 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38026.
When was CVE-2026-49872 published?: CVE-2026-49872 was published on 2026-06-19 and last updated on 2026-06-23.

References

Affected products (1)

cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

165.154.147.110 (ipv4-addr)