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VulnerabilityPublished Updated

CVE-2023-46303: calibre

Affects calibreSource CVE Database V5

0

Not known to be exploited : upgrade to 6.19.0 when convenient.

Data as of 26 Oct 2026, 10:12 UTC

Severity
Medium

Rated Medium by the CNA (mitre) · No CVSS score from NVD or the CNA

EPSS
1.6% chance of exploitation in 30 days – higher than 76% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.19.0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Oct 2023

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade calibre to 6.19.0.

Affected software

ProductAffectedFixed in
PyPIcalibrepkg:pypi/calibreOther threatsAffected
  • <6.19.0
Fixed in
  • 6.19.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade calibre to version 6.19.0 or later, where this vulnerability has been fixed. No other specific mitigations are indicated.

Description

A vulnerability in calibre before version 6.19.0 allows the link_to_local_path function in ebooks/conversion/plugins/html_input.py to add resources outside of the document root by default. This could lead to unintended resource inclusion during ebook conversion.

References

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