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Apache Neethi CVE-2026-91867

CRITICAL
2026-09-18
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vuln.today AI
5.3 MEDIUM

Network-reachable, no auth or interaction needed, but impact is limited to tying up threads (availability-only, A:L) with no C/I impact; single-request effect is partial, not total.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Lifecycle Timeline

2
Analysis Generated
Sep 18, 2026 - 18:16 vuln.today
CVE Published
Sep 18, 2026 - 16:24 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Denial of service in Apache Neethi (org.apache.neethi:neethi) before 3.2.4 allows a malicious or compromised remote policy server to stall a WS-Policy fetch indefinitely, tying up the calling thread for as long as the server keeps trickling bytes. Deployments are exposed only where an application uses Neethi to resolve a remote PolicyReference over HTTP; applications that consume locally embedded or bundled policy documents are not affected. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
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Vulnerability AssessmentAI

Exploitation Requires that the deploying application uses Apache Neethi to fetch a remote policy reference over the network AND that an attacker can control or influence the responding server (or interpose one) so it delivers bytes slowly without ever completing. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine but low-to-moderate priority issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: Apache Neethi 3.2.4, which introduces a bound on the total policy-fetch transfer time; upgrade the org.apache.neethi:neethi dependency to 3.2.4 and rebuild, then confirm via dependency-tree inspection that no transitive path pins an older Neethi. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory Java applications that depend on org.apache.neethi:neethi and determine which of them resolve remote PolicyReference endpoints over HTTP rather than loading bundled policy documents, since only those are exposed; for any confirmed to do so, restrict outbound HTTP/S from those hosts to an approved allowlist of policy servers and configure strict connect/read/socket timeouts and maximum response-size limits on the HTTP client used for policy fetch. …

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CVE-2026-91867 vulnerability details – vuln.today

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