CVE catalog

CVE-2026-30853

calibre affected and fixed versions

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to 9.5.0, a path traversal vulnerability in the RocketBook (.rb) input plugin (src/calibre/ebooks/rb/reader.py) allows an attacker to write arbitrary files to any path writable by the calibre process when a user opens or converts a crafted .rb file. This is the same bug class fixed in CVE-2026-26065 for the PDB readers, but the fix was never applied to the RB reader. This vulnerability is fixed in 9.5.0.

Severity: High · CVSS 8.2CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
Published: Mar 13, 2026, 7:00:09 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.19% · Oct 27, 2026

Projects and upstream resources

[calibre][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	calibre	`8.5.0+ds-1+deb13u3`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debiansid	calibre	`9.17.0+ds+~1.1.2-1`	Fixed	[CVE-2026-30853]
Debiansid	calibre	`9.5.0+ds+~0.10.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debianforky	calibre	`9.17.0+ds+~1.1.2-1`	Fixed	[CVE-2026-30853]
Debianforky	calibre	`9.5.0+ds+~0.10.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debianbookworm-security	calibre	`6.13.0+repack-2+deb12u10`	Fixed	[CVE-2026-30853]
Debianbookworm	calibre	`6.13.0+repack-2+deb12u8`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debianbookworm	calibre	`6.13.0+repack-2+deb12u9`	Fixed	[CVE-2026-30853]

Showing 8 fix observations. All 9 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	calibre	Not reported	UnknownSource applicability is not established	Provider not reported
Debianbookworm	calibre	`6.13.0+repack-2+deb12u8`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debianbookworm	calibre	`6.13.0+repack-2+deb12u9`	Fixed	[CVE-2026-30853]
Debianbookworm-security	calibre	`6.13.0+repack-2+deb12u10`	Fixed	[CVE-2026-30853]
Debianforky	calibre	`9.17.0+ds+~1.1.2-1`	Fixed	[CVE-2026-30853]
Debianforky	calibre	`9.5.0+ds+~0.10.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debiansid	calibre	`9.17.0+ds+~1.1.2-1`	Fixed	[CVE-2026-30853]
Debiansid	calibre	`9.5.0+ds+~0.10.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]
Debiantrixie	calibre	`8.5.0+ds-1+deb13u3`	FixedDistribution-reported fixed boundary	[CVE-2026-30853]

Original provider fields

{
  "package_releases": [
    {
      "name": "calibre",
      "status": "fixed",
      "release": "sid",
      "version": "9.17.0+ds+~1.1.2-1"
    },
    {
      "name": "calibre",
      "status": "fixed",
      "release": "forky",
      "version": "9.17.0+ds+~1.1.2-1"
    },
    {
      "name": "calibre",
      "status": "fixed",
      "release": "trixie",
      "version": "8.5.0+ds-1+deb13u3"
    },
    {
      "name": "calibre",
      "status": "fixed",
      "release": "bookworm",
      "version": "6.13.0+repack-2+deb12u9"
    },
    {
      "name": "calibre",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "6.13.0+repack-2+deb12u10"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "calibre",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "9.5.0+ds+~0.10.5-1"
    },
    {
      "bug": null,
      "name": "calibre",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "9.5.0+ds+~0.10.5-1"
    },
    {
      "bug": null,
      "name": "calibre",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "8.5.0+ds-1+deb13u3"
    },
    {
      "bug": null,
      "name": "calibre",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "6.13.0+repack-2+deb12u8"
    }
  ],
  "distribution_packages": [
    {
      "name": "calibre",
      "fixed_version": "not yet fixed",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[calibre]Unknown
Details (4)
- 6.13.0+repack-2+deb12u9 · all · bookworm
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u9 · all · bookworm
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u10 · all · bookworm-security
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u10 · all · bookworm-security
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
[calibre-bin]Unknown
Source package: [calibre]
Details (4)
- 6.13.0+repack-2+deb12u9 · amd64 · bookworm
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u9 · arm64 · bookworm
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u10 · amd64 · bookworm-security
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12
- 6.13.0+repack-2+deb12u10 · arm64 · bookworm-security
  Affected · Fixed: 6.13.0+repack-2+deb12u8
  dsa · calibre · debian · bookworm; dsa · calibre · debian · 12

[Debian 13 (Trixie)]

[calibre]Unknown
Details (4)
- 8.5.0+ds-1+deb13u3 · all · trixie
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.5.0+ds-1+deb13u3 · all · trixie
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.16.2+ds+~0.10.5-3~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.16.2+ds+~0.10.5-3~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
[calibre-bin]Unknown
Source package: [calibre]
Details (4)
- 8.5.0+ds-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.5.0+ds-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.16.2+ds+~0.10.5-3~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13
- 8.16.2+ds+~0.10.5-3~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.5.0+ds-1+deb13u3
  dsa · calibre · debian · 13

Observed: Oct 24, 2026, 12:37:09 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]