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CVE-2026-25635

calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution

Published: Feb 6, 2026Updated: Feb 17, 2026 Sources: CVE List NVDCWE-22
NVD MITRE
8.6CVSSHIGH
EPSS Score
0.4%
Top 65.2%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-22

Affected Products

calibrekovidgoyal
On-prem
Consumer Software / productivity
calibrecalibre-ebook
On-prem
Consumer Software / productivity
kovidgoyalindividual-devConsumer Softwareaka calibre, kitty
calibre-ebookoss-projectConsumer Softwareaka calibre

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxr
github.com
https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9
github.com
https://0x5t.raptx.org/posts/calibre-chm-rce
0x5t.raptx.org

Timeline

Published
Feb 6, 2026
Last Updated
Feb 17, 2026

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