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CVE-2026-26824

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:81c52b5a0259395fb3a656090f8ca012e6319697adafd3ce0f93a6feb94d38dc
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

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:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-457","description":"CWE-457 Use of Uninitialized Variable","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /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:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"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:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /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:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-457","description":"CWE-457 Use of Uninitialized Variable","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/libxls/libxls/issues/155"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /containers/adp/0/references/0
{"url":"https://github.com/libxls/libxls/issues/155"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:761728acd79eaec1a8a64213f5abf900509a71188130983069fc1175d7565f70 · sha256:17cd96b3f2024a64… · /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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