CVE-2026-7714Public exploitNetwork attack vector

Unauthenticated resource exhaustion via bulk-processing endpoints

Published May 4, 2026 · Updated May 4, 2026

Missing authentication in Calibre-Web Automated 4.0.0 through 4.0.6 allows remote attackers to exhaust server resources via admin endpoints. The cwa-convert-library-start and cwa-epub-fixer-start GET handlers launch whole-library conversion or EPUB rewriting without login or admin checks. A single unauthenticated request can drive CPU and disk I/O and rapidly consume storage, while status and log endpoints expose operation details.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Calibre-Web Automated 4.0.0 through 4.0.6 allows remote attackers to exhaust server resources via admin endpoints. The cwa-convert-library-start and cwa-epub-fixer-start GET handlers launch whole-library conversion or EPUB rewriting without login or admin checks. A single unauthenticated request can drive CPU and disk I/O and rapidly consume storage, while status and log endpoints expose operation details.

The record

CVE
CVE-2026-7714
Published
May 4, 2026
Updated
May 4, 2026
Vendor
CrocodileStick
Product
Calibre-Web Automated
Classifications
CWE-306, CWE-287, T1496
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 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=4.0.0
  2. Affected versionversion=4.0.1
  3. Affected versionversion=4.0.2
  4. Affected versionversion=4.0.3
  5. Affected versionversion=4.0.4
  6. Affected versionversion=4.0.5
  7. Affected versionversion=4.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CrocodileStick · Calibre-Web Automatedversion=4.0.0; version=4.0.1; version=4.0.2; version=4.0.3; version=4.0.4; version=4.0.5; version=4.0.6

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.4VulDBAV:N/AC:L/Au:N/C:N/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-306Missing Authentication for Critical Function
CWE-287Improper Authentication
T1496Resource Hijacking

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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