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CVE-2026-53511

calibre is an e-book manager. Prior to 9.10.0, a malicious EPUB, OPF, or PDF file can execute arbitrary Python code when its metadata is read by calibre, including through Add books or Edit books, by embedding a custom column definition with a python: template in calibre:user_metadata that is passed unsanitized to exec() in the template formatter. This issue is fixed in version 9.10.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8c91214deabee3e37c5bbebe095c79092090252eeb25099ecb469b32f7c30444
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"calibre","vendor":"kovidgoyal","versions":[{"status":"affected","version":"< 9.10.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.5,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"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:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/kovidgoyal/calibre/commit/712f4e1ff5c1e798c335bef3bacc4efdee052e9c","tags":["x_refsource_MISC"],"url":"https://github.com/kovidgoyal/calibre/commit/712f4e1ff5c1e798c335bef3bacc4efdee052e9c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/cna/references/1
{"name":"https://github.com/kovidgoyal/calibre/releases/tag/v9.10.0","tags":["x_refsource_MISC"],"url":"https://github.com/kovidgoyal/calibre/releases/tag/v9.10.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-2j4m-2q7x-2c47"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /containers/adp/0/references/0
{"name":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-2j4m-2q7x-2c47","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-2j4m-2q7x-2c47"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8dca0e914dbf267c5dddb3a1d8c2266be3f22c3376399e7457d0b324e9d4b9d1 · sha256:ed79b7f5250d3227… · /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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