CVE Explorer

CVE-2026-26825

A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reachable via xls_parseWorkBook() and is triggered by uninitialized heap memory originating from the OLE layer (ole2_read). The flaw is detectable with MemorySanitizer (MSAN) and can lead to undefined behavior, incorrect parsing logic, or potential information disclosure.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:18c4f9c9fb6a25fe0b4532c572a8490271102fd638f0c1932091c451f4e08724

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-908","description":"CWE-908 Use of Uninitialized Resource","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-908","description":"CWE-908 Use of Uninitialized Resource","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion

{"url":"https://github.com/libxls/libxls/issues/156"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8f208a9bc788ec779b6f0b1ad36c05441c061f6bbcac909bfc8fd2c12c014432 · sha256:c278a6d49647cdbd… · /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.

← Back to CVE Explorer