CVE-2026-91752
GNU libextractor before 1.15 Stack Overflow via OLE2
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
GNU libextractor before 1.15 Stack Overflow via OLE2
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
CVE-2026-91752- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
EUVDEUVD-2026-78234
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
EUVD-2026-78234- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-vrwm-2jf2-f6fv
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the...
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
GHSA-vrwm-2jf2-f6fv- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
NVD
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
CVE-2026-91752- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-91752
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
DEBIAN-CVE-2026-91752- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-91752
GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.
- Record
UBUNTU-CVE-2026-91752- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2026-0484 No score
Updated libextractor package fixes security vulnerabilities
GNU libextractor before 1.15 Stack Overflow via OLE2. (CVE-2026-91752) GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX. (CVE-2026-100310)
- Record
MGASA-2026-0484- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libextractorDebian:12 |
All versions, plus listed versions 1:1.11-71:1.11-81:1.13-11:1.13-101:1.13-2 Show 11 moreShow less1:1.13-31:1.13-41:1.13-4+loong641:1.13-51:1.13-61:1.13-71:1.13-81:1.13-91:1.17-11:1.19-11:1.19-2 |
None known |
libextractorDebian:13 |
All versions, plus listed versions 1:1.13-101:1.13-81:1.13-91:1.17-11:1.19-11:1.19-2 |
None known |
libextractorDebian:14 |
before 1:1.17-1, plus listed versions 1:1.13-101:1.13-81:1.13-9 |
1:1.17-1 |
libextractorMageia:10 From an advisory covering 2 CVEs |
before 1.16-1.mga10 | 1.16-1.mga10 |
libextractorUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 1:1.1-1ubuntu11:1.2-1ubuntu11:1.3-11:1.3-1ubuntu0.1~esm1 |
None known |
libextractorUbuntu:16.04:LTS |
All versions, plus listed versions 1:1.3-2build11:1.3-2ubuntu11:1.3-31:1.3-4+deb9u3build0.16.04.1 |
None known |
libextractorUbuntu:18.04:LTS |
All versions, plus listed versions 1:1.3-4build31:1.6-11:1.6-1build11:1.6-2 |
None known |
libextractorUbuntu:20.04:LTS |
All versions, plus listed versions 1:1.9-21:1.9-2ubuntu11:1.9-3 |
None known |
libextractorUbuntu:22.04:LTS |
All versions, plus listed versions 1:1.11-5 |
None known |
libextractorUbuntu:24.04:LTS |
All versions, plus listed versions 1:1.11-81:1.13-31:1.13-3build21:1.13-3build3 |
None known |
libextractorUbuntu:26.10 |
All versions, plus listed versions 1:1.13-91:1.13-101:1.19-2 |
None known |
libextractorUbuntu:26.04:LTS |
All versions, plus listed versions 1:1.13-8build11:1.13-9 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-91752 is a high vulnerability (CVSS 8.7) in Gnu Libextractor, published September 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.74%, the 54th percentile. Fixed in libextractor 1:1.17-1.
References
github.com/Haitam-lazaar/libextractor-ole2-rce
git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html
gnu.org/software/libextractor
vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2
openwall.com/lists/oss-security/2026/09/16/16
Show 9 moreShow less
nvd.nist.gov/vuln/detail/CVE-2026-91752
security-tracker.debian.org/tracker/CVE-2026-91752
advisories.mageia.org/MGASA-2026-0484.html
bugs.mageia.org/show_bug.cgi?id=36327
ubuntu.com/security/CVE-2026-91752
cve.org/CVERecord?id=CVE-2026-91752