{"id":"CVE-2026-25731","aliases":["DEBIAN-CVE-2026-25731","EUVD-2026-5573","GHSA-xrh9-w7qx-3gcc","UBUNTU-CVE-2026-25731","openSUSE-SU-2026:10587-1"],"status":"published","title":"Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export","description":"calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00276,"percentile":0.20308,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-1336"],"published":"2026-02-06T20:14:35Z","modified":"2026-10-28T02:30:59Z","exploits":[{"source":"pocgithub","id":"dxlerYT/CVE-2026-25731","title":"dxlerYT/CVE-2026-25731","date":"2026-02-06","url":"https://github.com/dxlerYT/CVE-2026-25731"}],"fixes":[{"ecosystem":"Debian:12","package":"calibre","fixed_in":["6.13.0+repack-2+deb12u6"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"calibre","fixed_in":["8.5.0+ds-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"calibre","fixed_in":["9.2.0+ds+~0.10.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.13.0+repack-2+deb12u6"}]}],"versions":["6.13.0+repack-2","6.13.0+repack-2+deb12u1","6.13.0+repack-2+deb12u2","6.13.0+repack-2+deb12u3","6.13.0+repack-2+deb12u4","6.13.0+repack-2+deb12u5"]},{"source":"osv","ecosystem":"Debian:13","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.0+ds-1+deb13u2"}]}],"versions":["8.5.0+ds-1","8.5.0+ds-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.2.0+ds+~0.10.5-1"}]}],"versions":["8.10.0+ds-1","8.10.0+ds-2","8.10.0+ds-3","8.11.0+ds+~0.10.5-1","8.11.1+ds+~0.10.5-1","8.11.1+ds+~0.10.5-2","8.11.1+ds+~0.10.5-3","8.12.0+ds+~0.10.5-1","8.13.0+ds+~0.10.5-1","8.13.0+ds+~0.10.5-2","8.13.0+ds+~0.10.5-3","8.14.0+ds+~0.10.5-1","8.14.0+ds+~0.10.5-1~bpo13+1","8.15.0+ds+~0.10.5-1","8.15.0+ds+~0.10.5-1~bpo13+1","8.15.0+ds+~0.10.5-2","8.16.0+ds+~0.10.5-1","8.16.0+ds+~0.10.5-2","8.16.1+ds+~0.10.5-1","8.16.2+ds+~0.10.5-1","8.16.2+ds+~0.10.5-2","8.16.2+ds+~0.10.5-3","8.16.2+ds+~0.10.5-3~bpo13+1","8.5.0+ds-1","8.6.0+ds-1","8.7.0+ds-1","8.8.0+ds-1","8.8.0+ds-2","8.8.0+ds-2+gcc15","8.8.0+ds-3","8.9.0+ds-1","8.9.0+ds-2","8.9.0+ds-3","8.9.0+ds-4","9.0.0+ds+~0.10.5-1","9.1.0+ds+~0.10.5-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.33.0+dfsg-1build1","2.38.0+dfsg-1","2.45.0+dfsg-1","2.45.0+dfsg-1build1","2.48.0+dfsg-1","2.48.0+dfsg-1build1","2.54.0+dfsg-1","2.55.0+dfsg-1","2.55.0+dfsg-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.0+dfsg-2","3.7.0+dfsg-2build1","3.12.0+dfsg-1","3.13.0+dfsg-1","3.14.0+dfsg-1","3.15.0.1+dfsg-1","3.16.0+dfsg-1","3.16.0+dfsg-1build1","3.17.0+dfsg-1","3.17.0+dfsg-2","3.18.0+dfsg-1build1","3.19.0+dfsg-1","3.20.0+dfsg-1","3.21.0+dfsg-1","3.21.0+dfsg-1build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.46.0+dfsg-1","4.2.0+dfsg-2","4.3.0+dfsg-1","4.3.0+dfsg-2","4.4.0+dfsg-1","4.5.0+dfsg-1","4.5.0+dfsg-2","4.5.0+dfsg-3","4.6.0+dfsg-1","4.7.0+dfsg-1","4.99.3+dfsg-2","4.99.4+dfsg-1","4.99.4+dfsg-1build1","4.99.4+dfsg+really4.10.0+py3-2","4.99.4+dfsg+really4.11.2-1","4.99.4+dfsg+really4.11.2-1build1","4.99.4+dfsg+really4.12.0-1","4.99.4+dfsg+really4.12.0-1build1","4.99.4+dfsg+really4.12.0-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.25.0+dfsg-2","5.33.2+dfsg-1","5.34.0+dfsg-1","5.35.0+dfsg-1ubuntu2","5.37.0+dfsg-1","5.37.0+dfsg-1build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.24.0+ds-1","6.29.0+ds-1","7.0.0+ds-1","7.1.0+ds-1","7.1.0+ds-2","7.2.0+ds-1","7.2.0+ds-1build1","7.3.0+ds-1","7.4.0+ds-1","7.5.1+ds-1","7.5.1+ds-2","7.5.1+ds-3","7.6.0+ds-1","7.6.0+ds-1build1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.26.0+ds-4build1","8.3.0+ds-1","8.4.0+ds-1","8.5.0+ds-1","8.6.0+ds-1","8.7.0+ds-1","8.8.0+ds-2","8.8.0+ds-3","8.8.0+ds-3build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.1+ds+~0.10.5-2build1","9.9.0+ds+~0.10.6-1","9.11.0+ds+~0.10.6-1","9.11.0+ds+~0.10.6-2","9.13.0+ds+~0.10.6-1","9.14.0+ds+~0.10.6-2build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"calibre","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.8.0+ds-3build1","8.13.0+ds+~0.10.5-3","8.14.0+ds+~0.10.5-1","8.15.0+ds+~0.10.5-1","8.16.0+ds+~0.10.5-2","8.16.2+ds+~0.10.5-1","8.16.2+ds+~0.10.5-2","8.16.2+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Party Advisory","advisory","report"]},{"url":"https://github.com/kovidgoyal/calibre/commit/f0649b27512e987b95fcab2e1e0a3bcdafc23379","tags":["x_refsource_MISC","Patch","fix","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25731.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25731","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-25731","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-25731","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-25731","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25635","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25636","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25731","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-26064","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-26065","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27810","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-27824","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-30853","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-33205","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-33206","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-25731","title":"Calibre 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Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.","status":"published","published":"2026-02-06T20:14:35.822Z","modified":"2026-02-06T21:02:01.147Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T13:41:30.911526Z"}],"euvd":[{"id":"EUVD-2026-5573","description":"calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. 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This vulnerability is fixed in 9.2.0.","status":"published","published":"2026-02-06T20:14:35.822Z","modified":"2026-10-28T02:30:59.04971593Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1336"],"updated_at":"2026-11-02T15:44:59.438965Z"},{"id":"DEBIAN-CVE-2026-25731","description":"calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.","status":"published","published":"2026-02-06T21:16:19.457Z","modified":"2026-10-01T03:03:08.803962867Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"UBUNTU-CVE-2026-25731","description":"calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.","status":"published","published":"2026-02-06T21:16:00Z","modified":"2026-10-17T12:56:12.753664062Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"},{"id":"openSUSE-SU-2026:10587-1","title":"calibre-9.7.0-1.1 on GA media","description":"These are all security issues fixed in the calibre-9.7.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-04-21T00:00:00Z","modified":"2026-04-22T08:17:17.617311Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}