CVE-2026-8318Public exploitNetwork attack vector

Service hang via unbounded LLM retry loop

Published May 11, 2026 · Updated May 11, 2026

Denial of service in Vectify AI PageIndex allows remote attackers to hang PDF indexing with a crafted table of contents. The toc_transformer function in pageindex/page_index.py repeatedly requests continuation after length-truncated LLM output without a retry limit or reachable bailout. Unauthenticated document submission must reach the affected handler; the loop can hold a CPU thread, keep issuing paid API requests, and interrupt the indexing service.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Vectify AI PageIndex allows remote attackers to hang PDF indexing with a crafted table of contents. The toc_transformer function in pageindex/page_index.py repeatedly requests continuation after length-truncated LLM output without a retry limit or reachable bailout. Unauthenticated document submission must reach the affected handler; the loop can hold a CPU thread, keep issuing paid API requests, and interrupt the indexing service.

The record

CVE
CVE-2026-8318
Published
May 11, 2026
Updated
May 11, 2026
Vendor
Vectify AI
Product
PageIndex
Classifications
CWE-404, CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=f50e52975313c6716c02b20a119577a1929decba

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vectify AI · PageIndexversion=f50e52975313c6716c02b20a119577a1929decba

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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