EUVD-2026-81299
GHSA-mrx9-2rrp-rhpx
Severity by source
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
Network-reachable, unauthenticated, low-complexity regex DoS with availability-only impact; A:H reflects sustained event-loop stall via repeated large requests, C/I:N as no data exposure.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
4DescriptionCVE.org
joi (npm package joi, hapi.js) versions >=17.2.0 <17.13.7 and >=18.0.0 <18.2.6 are vulnerable to regular expression denial of service in the Joi.string().isoDate() validation rule. One of the regular expressions the rule applies to the input is unanchored, so a valid ISO date followed by a long run of fractional-second digits causes the regex engine to restart its search from every position in the string, yielding time proportional to the square of the input length (about 1.4 s for 64 KB of digits and about 22 s for 256 KB). A remote attacker who can supply a string to an isoDate validation can stall the application with a single request. Fixed in 17.13.7 and 18.2.6; as a workaround, cap the length of the string before it reaches joi.
Articles & Coverage 1
AnalysisAI
Denial of service in the Joi npm package's isoDate() validation rule allows unauthenticated remote attackers to stall Node.js applications by supplying a valid ISO date followed by a long run of fractional-second digits, causing quadratic regex engine restarts. Affected versions are 17.2.0 through 17.13.6 and 18.0.0 through 18.2.5; no public exploit identified at time of analysis, but the availability impact is high (CVSS 8.7) and unbounded inputs can cause multi-second stalls per request. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The application must invoke the Joi.string().isoDate() validation rule on attacker-controllable input AND must NOT cap the input string length before it reaches joi. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are consistent and point to a genuine but bounded availability risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: 17.13.7 and 18.2.6. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every service, container image, and build artifact that resolves Joi versions 17.2.0 through 17.13.6 or 18.0.0 through 18.2.5, including transitive dependencies (run npm ls joi and scan lockfiles), and prioritize externally reachable services; where upgrade cannot happen immediately, impose strict input-length caps on ISO-date fields and hard request timeouts at the edge (WAF or reverse proxy) to bound pathological inputs. …
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