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CVE-2026-26824VulnerabilityPublished Updated

SUSE · Security update for libxls

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-26824· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 10 Nov 2026, 20:08 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHublibxls/libxlspkg:github/libxls/libxlsOther threatsAffected
  • <=1.6.3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Update libxls to releases 1.6.3 or 1.6.4 where these issues are fixed. Since this is a library, ensure that all dependent applications are rebuilt or updated to use the patched versions. No other mitigation is indicated by the vendor advisory.

Description

This security update for libxls addresses multiple vulnerabilities including use of uninitialized memory in OLE parsing and read_MSAT, out-of-bounds reads in the formula dumper, and buffer overflows when parsing style records. The fixes also improve handling of allocation failures and correct issues related to UTF-8 locale creation and big-endian systems. These vulnerabilities could lead to memory corruption or crashes when processing Excel files.

References

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