High 8.6Published Feb 6, 2026

CVE-2026-25635calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution

Updated under an hour ago (Oct 26, 2026, 5:30 AM ET)

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It affects kovidgoyal calibre and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for kovidgoyal calibre

Exploited in the last 30 days

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: 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kovidgoyal calibre kovidgoyal:calibre (from the name)	before 9.2.0	CNA record
calibre-ebook calibre calibre-ebook:calibre	before 9.2.0	NVD

References

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxrx-refsource-confirm, exploit, third-party-advisory
https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9x-refsource-misc, patch
https://0x5t.raptx.org/posts/calibre-chm-rceexploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.