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CVE-2026-25636

calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:44d0a38ed9d93edfa0acad47c27b35f6875abde38ae24bb880f6ea44f2efecaa
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"calibre","vendor":"kovidgoyal","versions":[{"status":"affected","version":"< 9.2.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/problemTypes/2/descriptions/0

Source references

3 source assertions
{"url":"https://0x5t.raptx.org/posts/calibre-epub-rce"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/adp/1/references/0
{"name":"https://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726","tags":["x_refsource_MISC"],"url":"https://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/references/1
{"name":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c46e286524470917a0d98226e4362b8264b08193bd4c4289a793f35cf49cde5 · sha256:7062c13cee270cd2… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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