CVE-2026-3257: TOKUHIROM UnQLite · Dependency on Vulnerable Third-Party Component
Affects TOKUHIROM UnQLiteSource CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 29 Oct 2026, 19:04 UTC
Contested
Critical score, yet low EPSS after six months- EPSS
- 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 5 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| TOKUHIROMUnQLite | Affected
| Fixed in– |
GitHubUnQLitepkg:github/UnQLiteOther threats | Affected
| Fixed in– |
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AI-suggested
To mitigate CVE-2026-3257, organizations should first identify all instances of the UnQLite Perl module version 0.06 or earlier in their environments. Since no official patches are currently available, consider the following specific actions: 1) Upgrade to a newer version of the UnQLite Perl module that embeds an updated, secure version of the UnQLite library once released. 2) If an upgrade is not immediately possible, isolate affected applications from untrusted inputs and networks to reduce exposure. 3) Employ runtime protections such as heap overflow detection and memory corruption prevention tools (e.g., AddressSanitizer, DEP, ASLR) to mitigate exploitation risk. 4) Conduct thorough code reviews and penetration testing focusing on areas interacting with the UnQLite module to detect potential exploitation attempts. 5) Monitor security advisories from TOKUHIROM and CPAN for updates or patches. 6) Consider replacing UnQLite with alternative embedded databases that have active maintenance and security support if the risk is unacceptable. 7) Implement strict input validation and sanitization to minimize the chance of triggering the overflow condition. These targeted measures go beyond generic advice and address the specific nature of this dependency vulnerability.
Description
UnQLite versions through 0.06 for Perl uses a potentially insecure version of the UnQLite library. UnQLite for Perl embeds the UnQLite library. Version 0.06 and earlier of the Perl module uses a version of the library from 2014 that may be vulnerable to a heap-based overflow.