CVE-2026-73248 calibre: Bypass of Python template restrictions via nested `template()` leading to RCE

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled compositetemplate metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allowpythontemplates=False, allowing a nested python:...

CVE-2026-73248 calibre: Bypass of Python template restrictions via nested `template()` leading to RCE

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled compositetemplate metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allowpythontemplates=False, allowing a nested python:...

CVE-2026-73248

CVE-2026-73248 affects calibRE prior to 9.12.0, where attacker-controlled composite_template metadata in EPUB/OPF/PDF files via a nested template() with a formatter that does not inherit allow_python_templates=False can reach compile_python_template and execute arbitrary Python code when the file...

EUVD-2026-57014

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled compositetemplate metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allowpythontemplates=False, allowing a nested python:...

CVE-2026-73248

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled compositetemplate metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allowpythontemplates=False, allowing a nested python:...

CVE-2026-73248

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled compositetemplate metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allowpythontemplates=False, allowing a nested python:...

PT-2026-70940

calibre is an e-book manager. Prior to 9.12.0, the calibre Content Server endpoint POST /book-update-annotations/library id/book id/fmt in src/calibre/srv/books.py omits needs db write=True, causing Router.dispatch to skip ctx.check for write access before update annotations passes...

PT-2026-70939

calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled composite template metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template call whose formatter does not inherit allow python templates=False, allowing a nested python:...

[SECURITY] Fedora 44 Update: calibre-9.11.0-1.fc44

Calibre is meant to be a complete e-library solution. It includes library management, format conversion, news feeds to ebook conversion as well as e-book reader sync features. Calibre is primarily a ebook cataloging program. It manages your ebook collection for you. It is designed around the...

Linux Distros Unpatched Vulnerability : CVE-2026-53511

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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,...

DEBIAN-CVE-2026-53511

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:usermetadata that is pass...

CVE-2026-53511

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:usermetadata that is pass...

UBUNTU-CVE-2026-53511

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:usermetadata that is pass...

CVE-2026-53511

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:usermetadata that is pass...

CVE-2026-53511

Calibre vulnerability CVE-2026-53511 affects the calibre e-book manager prior to version 9.10.0. A malicious EPUB/OPF/PDF can trigger arbitrary Python code execution when metadata is read by calibre (e.g., via Add books or Edit books) by embedding a python: template in calibre:user_metadata; the ...

CVE-2026-53511 calibre: Arbitrary Code Execution in Template Formatter via Book Metadata

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:usermetadata that is pass...

CVE-2026-53511 calibre: Arbitrary Code Execution in Template Formatter via Book Metadata

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:usermetadata that is pass...

CVE-2026-53511

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:usermetadata that is pass...

CVE-2026-53511

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:usermetadata that is pass...

PYSEC-2026-1234 Calibre-Web Has a Stored Cross-Site Scripting (XSS) Vulnerability via the 'username' Field During User Creation

A Stored Cross-Site Scripting XSS vulnerability in Calibre-Web v0.6.25 allows attackers to inject malicious JavaScript into the 'username' field during user creation. The payload is stored unsanitized and later executed when the /ajax/listusers endpoint is accessed...