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Text Embeddings Inference EUVDEUVD-2026-97008

| CVE-2026-108857 MEDIUM
Insertion of Sensitive Information into Log File (CWE-532)
2026-10-11 VulnCheck GHSA-6w4q-53gw-556h
4.8
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain access to router logs or OTLP telemetry
  2. Exploit
    Read cleartext api_key Bearer token from startup output
  3. Execution
    Authenticate to protected TEI endpoints
  4. Impact
    Call embedding and rerank APIs

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A09:2025 - Security Logging & Alerting Failures
ASVS 5.0
V16 - Security Logging and Error Handling Log data sanitization
Exploitation Conditions

Exploitation requires the attacker to already have read access to one of the data sinks where the router prints its configuration: the router startup logs, container stdout/output, or the OTLP telemetry stream - and the deployment must have an api_key configured (otherwise there is no protected endpoint and no secret to leak). It is specifically the router's Args struct lacking a redact attribute for the api_key field that causes the key to be logged in cleartext. Limiting factors: this is not remotely exploitable over the network (AV:L) and requires existing privileged/log-reading access (PR:L); the impact is confined to recovering one Bearer token that grants access only to the embedding and rerank endpoints, with no direct integrity or availability effect.

Impact

This is a genuine but modest-severity information-disclosure flaw (CWE-532), not a high-priority emergency. The only severity signal provided is the vendor/CVE CVSS 4.0 vector (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N, base 4.8 Medium), which is internally consistent with the description: AV:L and PR:L reflect that an attacker must already have access to router logs, container stdout, or OTLP telemetry - not a remote network path - and VC:L reflects limited confidentiality impact (leak of one Bearer token) with no integrity or availability impact. No EPSS score, CISA KEV listing, POC reference, or SSVC decision point was supplied, so exploitation-probability and automatability signals are simply absent rather than conflicting. There is no public exploit identified at time of analysis. The practical risk is bounded: an attacker who can already read the service's logs/telemetry is usually already inside a trust boundary, and the recovered key only unlocks the embedding and rerank endpoints (not arbitrary code or data exfiltration). Treat as a routine patch/log-hygiene item, prioritized higher only in multi-tenant or shared-logging environments where log access is broader than endpoint access.

Exploit ScenarioDerived

In a shared-observability deployment, a developer or operator with read access to the Text Embeddings Inference router's startup logs, container stdout, or OTLP telemetry pipeline reads the api_key printed in cleartext at startup. They reuse that Bearer token to call the otherwise-protected embedding and rerank endpoints, bypassing the intended authentication. No public exploit code is required - recovery is a simple log/telemetry read.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 11, 2026

Cleartext logging in Hugging Face Text Embeddings Inference through 1.9.4 exposes the configured api_key because the router's Args struct lacks a redact attribute for that field. Attackers who already have read access to router startup logs, container output, or OTLP telemetry can recover the Bearer token and use it to call protected embedding and rerank endpoints. This is a modest-severity, local information-disclosure issue (CWE-532) with no direct integrity or availability impact; no public exploit code or confirmed active exploitation is identified at time of analysis.

RemediationAI

No vendor-released patch is identified in the provided data; check the Hugging Face Text Embeddings Inference repository and the VulnCheck advisory for updated guidance. If an immediate upgrade is not possible, treat the api_key as compromised and rotate it, then restrict read access to router logs, container output, and OTLP telemetry so only trusted operators can view them. Because the key is logged in cleartext, log access controls alone do not remove the secret from stored logs; scrub or delete existing logs that may contain the key. As a temporary workaround, run the router without an api_key, but note that this disables authentication for the embedding and rerank endpoints and exposes them to anyone who can reach the service. Disabling OTLP export avoids leaking the key through telemetry but reduces observability. If the api_key must remain, use an external log-filtering or redaction layer before logs leave the host, accepting that it must correctly identify and mask the Bearer token.

Affected VersionsENISA

Text Embeddings Inference 0 ≤1.9.4

Affected Packages

euvd text_embeddings_inference no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is CWE-532 (Insertion of Sensitive Information into Log File) in the Rust-based router of Hugging Face Text Embeddings Inference. The router's Args configuration struct does not apply a redact attribute to the api_key field, so the key is printed in cleartext during startup and can also appear in container stdout and OTLP telemetry, as shown in the referenced router/src/main.rs lines (170-174 and 204-216). The CPE cpe:2.3:a:hugging_face:text_embeddings_inference:*:*:*:*:*:*:*:* confirms the affected product family, with the description scoping impact to versions through 1.9.4. Exploitation is not remote: it requires local or log-reading access (AV:L, PR:L) and a deployment where an api_key is configured; the recovered token grants access only to the embedding and rerank endpoints.

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Severity by source

Vendor (VulnCheck) PRIMARY 4.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
vuln.today AI 3.3 LOW

AV:L and PR:L because the attacker must already have log/telemetry read access; C:L for leak of a single scoped Bearer token; no integrity or availability impact.

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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

Hugging Face Text Embeddings Inference through 1.9.4 contains a cleartext logging vulnerability that exposes the configured api_key because the router's Args struct lacks a redact attribute for it. Attackers with access to router logs, container output, or OTLP telemetry can recover the Bearer token and call the protected embedding and rerank endpoints.

Threat Intelligence Overview

EPSS Score
0.1%
Top 99% exploitable
Prevalence
Medium
popular open-source HF embedding server, common in AI/ML stacks but not universal
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

24
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +24
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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