CVE-2026-49250Network attack vector

Service interruption via repeated form-entry scans

Published Sep 14, 2026 · Updated Sep 14, 2026

Algorithmic complexity in Conform 1.8.0 through 1.19.3 allows remote attackers to interrupt application services via crafted forms. parseSubmission repeatedly scans all FormData or URLSearchParams entries for each unique field name, causing excessive synchronous CPU work. Exposure requires an application to pass attacker-controlled submissions to the future API without effective request-parsing limits.

CVSS severity8.7
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Algorithmic complexity in Conform 1.8.0 through 1.19.3 allows remote attackers to interrupt application services via crafted forms. parseSubmission repeatedly scans all FormData or URLSearchParams entries for each unique field name, causing excessive synchronous CPU work. Exposure requires an application to pass attacker-controlled submissions to the future API without effective request-parsing limits.

The record

CVE
CVE-2026-49250
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Edmund Hung
Product
Conform
Classifications
CWE-407, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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=>= 1.8.0, < 1.19.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Edmund Hung · Conformversion=>= 1.8.0, < 1.19.4

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-407Inefficient Algorithmic Complexity
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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