SurrealDB before 2.1.0 Denial of Service via rand::time()

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

SurrealDB versions before 2.1.0 contain an uncaught exception vulnerability in the rand::time() function that panics when unwrap is called on a None result from timestamp_opt. Authorized clients can repeatedly invoke rand::time() to reliably trigger server panics and cause denial of service.

Source published

18 Jul 2026 13:10:01 UTC

Source modified

28 Jul 2026 01:47:47 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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CVSS 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

CVSS 3.1 · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SurrealDB versions before 2.1.0 contain an uncaught exception vulnerability in the rand::time() function that panics when unwrap is called on a None result from timestamp_opt. Authorized clients can repeatedly invoke rand::time() to reliably trigger server panics and cause denial of service.

Source published

Jul 18, 2026, 1:10:01 PM (timezone not stated)

Source modified

Jul 28, 2026, 1:47:47 AM (timezone not stated)

Observed here

29 Oct 2026 21:24:33 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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EUVD CVSS 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

SurrealDB versions before 2.1.0 contain an uncaught exception vulnerability in the rand::time() function that panics when unwrap is called on a None result from timestamp_opt. Authorized clients can repeatedly invoke rand::time() to reliably trigger server panics and cause denial of service.

Source published

18 Jul 2026 14:17:08 UTC

Source modified

27 Oct 2026 18:10:00 UTC

Observed here

29 Oct 2026 03:27:18 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 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

CVSS 3.1 · [email protected] · Secondary · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

The `rand::time()` function in SurrealQL generates a random time from an optional range of two Unix timestamps. Due to the underlying use of `timestamp_opt` from the `chrono` crate, this function could potentially return `None` in some instances, leading to a panic when `unwrap` was called on its result in order to return a SurrealQL `datetime` type to the caller of the function. ### Impact A client that is authorized to run queries in a SurrealDB server would be able to make repeated (in the order of millions) calls to `rand::time()` in order to reliably trigger a panic. This would crash the server, leading to denial of service. ### Patches The function has been updated in to guarantee that some `datetime` is returned or that an error is otherwise gracefully handled. - Version 2.1.0 and later are not affected by this issue. ### Workarounds Affected users who are unable to update may want to limit the ability of untrusted clients to run the `rand::time()` function in the affected versions of SurrealDB using security capabilities. To limit the impact of the denial of service, SurrealDB administrators may also want to ensure that the SurrealDB process is running so that it can be automatically re-started after a crash. ### References - #5126 - [SurrealQL Documentation - Database Functions (`rand::time`)](https://surrealdb.com/docs/surrealql/functions/database/rand#randtime) - [SurrealDB Documentation - Security Capabilities (Functions)](https://surrealdb.com/docs/surrealdb/security/capabilities#functions)

Source published

22 Nov 2024 20:11:38 UTC

Source modified

19 Jul 2026 03:56:48 UTC

Observed here

24 Oct 2026 13:19:54 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Publisher rating · MODERATE