8.5

CVE-2026-53511: kovidgoyal calibre Code Injection

CVSS: 8.5v4.0HighDeferred
AliasesUBUNTU-CVE-2026-53511DEBIAN-CVE-2026-53511openSUSE-SU-2026:11130-1
Published 07-07-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-53511 is a high (CVSS 8.5) Code Injection vulnerability in kovidgoyal calibre. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.2% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.20%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-07-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

Description

calibre is an e-book manager. Prior to 9.10.0, a malicious EPUB, OPF, or PDF file can execute arbitrary Python code when its metadata is read by calibre, including through Add books or Edit books, by embedding a custom column definition with a python: template in calibre:user_metadata that is passed unsanitized to exec() in the template formatter. This issue is fixed in version 9.10.0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

+0.05 pp

From 0.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • calibre< 6.13.0+repack-2+deb12u10 | All versions (No fix recorded) | < 9.10.0+ds+~0.10.6-1
Kovidgoyal1 product
Opensuse1 product
  • calibre&distro=openSUSE Tumbleweed< 9.10.0-1.1
Ubuntu1 product
  • calibreAll versions (No fix recorded)

4 vendors · 4 products

References

8 links