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CVE-2026-79592

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due...

7.5 HighFix available

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.43%Up 0.3 points since Sep 11, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
CVE-2026-79592
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2026-75746 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
EUVD-2026-75746
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-5w42-gv46-j4rp 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due...

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
GHSA-5w42-gv46-j4rp
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-125
Updated
2026-11-02
NVD 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
CVE-2026-79592
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-125
Updated
2026-11-02
OSVDEBIAN-CVE-2026-79592 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
DEBIAN-CVE-2026-79592
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-79592 7.5

An out-of-bounds read vulnerability exists in the xls_dumpSummary() function of libxls 1.6.3 due to insufficient validation of file-controlled OLE summary offsets.

Record
UBUNTU-CVE-2026-79592
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
r-cran-readxl
Debian:12
 All versions, plus listed versions
1.4.2-11.4.3-11.4.4-11.4.5-11.5.0-11.5.0.1-11.6.0-1
 None known
r-cran-readxl
Debian:13
 All versions, plus listed versions
1.4.5-11.5.0-11.5.0.1-11.6.0-1
 None known
r-cran-readxl
Debian:14
 before 1.6.0-1, plus listed versions
1.4.5-11.5.0-11.5.0.1-1
1.6.0-1
r-cran-readxl
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.1.0-1
 None known
r-cran-readxl
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.0.0-1build11.0.0-2
 None known
r-cran-readxl
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.3.1-21.3.1-2build1
 None known
r-cran-readxl
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.3.1-2build2
 None known
r-cran-readxl
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.4.3-1
 None known
r-cran-readxl
Ubuntu:26.10
 All versions, plus listed versions
1.4.5-11.5.0-1
 None known
r-cran-readxl
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.4.5-1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-79592 is a high vulnerability (CVSS 7.5) in r-cran-readxl, published September 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in r-cran-readxl 1.6.0-1.

References

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