CVE-2026-68765
hashcat KeePass KDBX v4 Module Heap Buffer Overflow via Token Field
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Active
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
5.2
hashcat KeePass KDBX v4 Module Heap Buffer Overflow via Token Field
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
CVE-2026-68765- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
EUVDEUVD-2026-60455
5.2
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
EUVD-2026-60455- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jfqq-rfm8-8frm
5.2
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the...
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
GHSA-jfqq-rfm8-8frm- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/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
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
NVD
5.2
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
CVE-2026-68765- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/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
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
OSV
5.2
hashcat KeePass KDBX v4 Module Heap Buffer Overflow via Token Field
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
CVE-2026-68765- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-122
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-68765
5.2
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that allows attackers to corrupt adjacent heap memory by supplying an oversized ninth hash field token. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer with no length check, allowing a maximal input to write up to 44 bytes past the buffer boundary into adjacent esalt fields and heap chunk metadata, potentially enabling heap corruption or memory access violations.
- Record
UBUNTU-CVE-2026-68765- CVSS 4.0
- 5.2 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
hashcatUbuntu:18.04:LTS |
All versions, plus listed versions 3.60-14.0.1-1 |
None known |
hashcatUbuntu:20.04:LTS |
All versions, plus listed versions 5.1.0+ds1-15.1.0+ds1-2 |
None known |
hashcatUbuntu:22.04:LTS |
All versions, plus listed versions 6.1.1+ds1-16.2.5+ds1-2 |
None known |
hashcatUbuntu:24.04:LTS |
All versions, plus listed versions 6.2.6+ds1-16.2.6+ds1-1build16.2.6+ds1-1build2 |
None known |
hashcatUbuntu:26.10 |
All versions, plus listed versions 7.1.2+ds1-37.1.2+ds1-4 |
None known |
hashcatUbuntu:26.04:LTS |
All versions, plus listed versions 6.2.6+ds2-17.1.2+ds1-3 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-68765 is a medium vulnerability (CVSS 5.2) in Hashcat, published August 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 7th percentile. No source names a fixed version.
References
github.com/hashcat/hashcat
github.com/hashcat/hashcat/pull/4755
github.com/hashcat/hashcat/commit/6f374c4ff7d5dc951530fbbbcf6b45e3c169b100
vulncheck.com/advisories/hashcat-keepass-kdbx-v4-module-heap-buffer-overflow-via-token-field
nvd.nist.gov/vuln/detail/CVE-2026-68765
github.com/advisories/GHSA-jfqq-rfm8-8frm
github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68765.json
ubuntu.com/security/CVE-2026-68765
cve.org/CVERecord?id=CVE-2026-68765