CVE-2026-91970 json
Vikunja before 2.6.0 Resource Exhaustion via Planka Migration
published last mo. modified 23d ago also EUVD-2026-78646 , GHSA-wq92-8x3r-fm38 , GO-2026-6757
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
Vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs. Authenticated attackers can submit migration requests pointing to attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users.
Patch / fix
- go code.vikunja.io/api 2.6.0
- go-vikunja vikunja 2.6.0
- github.com/go-vikunja/vikunja#3688 pull request
- github.com/go-vikunja/vikunja/releases/tag/v2.6.0 release
Is CVE-2026-91970 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | >=2.5.0, <2.6.0 all versions |
2.6.0 |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/go-vikunja/vikunja/pull/3688
web
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-91970
advisory
-
github.com
/go-vikunja/vikunja
package
-
github.com
/go-vikunja/vikunja/releases/tag/v2.6.0
web
Sources
- CVE List CVE-2026-91970
- GitHub Advisory GHSA-wq92-8x3r-fm38
- NVD CVE-2026-91970
- OSV GO-2026-6757
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.