CVE-2026-114049

LOW

3.7

CVSS v3

Description

vLLM before 0.31.0 contains a cross-request mask leak in InputBatch.condense() that allows remote attackers to constrain other clients' outputs by leaving stale allowed_token_ids rows. Attackers can submit concurrent constrained generate requests, including via unauthenticated /invocations, so recycled batch slots apply their token allowlist to victims' unrestricted requests.

CWE-440

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.27%probability of exploitation in 30 days

18thpercentile

Low risk: more likely to be exploited than 18% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-440 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-5108	Medium	6.5	10%	-	Fix
CVE-2023-6129	Medium	6.5	2.3%	-	Fix
CVE-2021-41035	Critical	9.8	1.8%	-	Fix
CVE-2023-4807	High	7.8	1.6%	-	Fix
CVE-2018-12550	High	8.1	1.4%	-	Fix
CVE-2019-6569	Critical	9.1	1.3%	-	Fix

Common questions

How do I fix CVE-2026-114049?

No published fix for CVE-2026-114049 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

Is CVE-2026-114049 being actively exploited?

Not that we know of. CVE-2026-114049 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.27% is the estimated probability that it will be exploited in the next 30 days. That is higher than 18% of all scored CVEs.

How severe is CVE-2026-114049?

CVE-2026-114049 has a CVSS v3 base score of 3.7, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-22.