> CVE-2026-73248 [HIGH]

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PUBLISHED
2026-08-11 22:19
MODIFIED
2026-08-11 22:19
CVSS_SCORE V3
8.5
EPSS (Prob. Exploit)
0.20%
Top 90.5%
DATA SOURCES:
NVD đź”— 2026-08-11 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 OSV đź”— 2026-10-26

> DESCRIPTION

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: template to reach compile_python_template and execute arbitrary Python code when the file is opened or imported. This issue is fixed in version 9.12.0.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
Unknown (P)
Interaction inconnue
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-94 CWE-95

> CWE DETAILED DESCRIPTIONS

CWE-94: Improper Control of Generation of Code - The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. | CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code - The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval").

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

calibre: Bypass of Python template restrictions via nested `template()` leading to RCE

AFFECTED PACKAGES:
Unknown / Unknown
413 versions affected
ALIASES:
GHSA-4f7g-rjfp-hmvx

> HISTORIQUE DES MODIFICATIONS

Première apparition
11/08/2026 22:19
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-94: Improper Control of Generation of Code ('Code Injection') - The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not n...
Nouvelle valeur:
CWE-94: Improper Control of Generation of Code - The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorr...
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-94: Improper Control of Generation of Code ('Code Injection') - The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not n...
Total des modifications: 2 Dernière mise à jour: 10 hours ago

> REFERENCES

https://github.com/kovidgoyal/calibre/commit/dac9990458374a81a5372a768bba6527d96...
https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4f7g-rjfp-hmvx
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