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TI-2026-71155 Aliases CVE-2026-109339GHSA-rj2f-8wx8-hgm5

Memory exhaustion in SurrealDB via Surrealism module output buffering

Priority LOW 31CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

SurrealDB from 3.1.0 before 3.3.0 and surrealism-runtime from 0.3.0 before 0.6.0 buffer module stdout and stderr lines without any limit in host memory, which bypasses the configured module memory limit. An attacker with high privileges who can install a module as Owner can run a malicious module that writes output without newlines, exhausting server memory and denying service to all namespaces and databases. The flaw is classified as CWE-770.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

SurrealDB 3.1.0 before 3.3.0 lets Surrealism modules exhaust server memory because module stdout/stderr lines are buffered unbounded in host memory, bypassing the configured module memory limit. An attacker can run an Owner-installed malicious module that writes output without newlines, crashing the server and denying service to all namespaces and databases.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00375 31st percentileScored 2026-11-07
Fix Fixed surrealdb (surrealdb): 3.3.0surrealism-runtime (surrealdb): 0.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
surrealdbsurrealdb3.1.0 to before 3.3.03.3.0Patch availableCNA
surrealdbsurrealism-runtime0.3.0 to before 0.6.00.6.0Patch availableCNA
  • surrealdb Vendorsurrealdb Affected 3.1.0 to before 3.3.0 Fixed in 3.3.0 Patch available CNA
  • surrealism-runtime Vendorsurrealdb Affected 0.3.0 to before 0.6.0 Fixed in 0.6.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*——surrealdb
  • cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:* Versions — — ·surrealdb

Remediation

Upgrade SurrealDB to version 3.3.0 and surrealism-runtime to version 0.6.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA surrealdb (surrealdb) Fixed in 3.3.0
  • Fix · CNA surrealism-runtime (surrealdb) Fixed in 0.6.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    surrealdb 3.3.0

    11 records Highest priority Priority LOW 11 LOW

    Other records, highest priority first

    • TI-2026-71159 Cross-tenant access in SurrealDB through the USE statementPriority LOW 39
    • TI-2026-71150 Cross-tenant access in SurrealDB through namespace and database selectionPriority LOW 37
    • TI-2026-71157 Field permission bypass in SurrealDB via PATCH copy and movePriority LOW 31
    Show all 11 records →

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109339
  2. 2026-10-12 Alias added: GHSA-rj2f-8wx8-hgm5
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-13 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-84300 SurrealDB index planner lets users infer restricted fields CVSS 4.0MEDIUM 5.3
  • TI-2026-84304 Server-side request forgery in SurrealDB via JWKS URL default ports CVSS 4.0MEDIUM 5.1
  • TI-2026-45344 SurrealDB before 3.1.0 Session Hijacking via /rpc sessions CVSS 4.0HIGH 8.7
  • TI-2024-38452 SurrealDB before 1.1.0 Denial of Service via HTTP Headers CVSS 4.0HIGH 8.7
  • TI-2026-45347 SurrealDB before 3.1.0 Denial of Service via JSON Parser CVSS 4.0HIGH 8.7
  • TI-2026-45334 SurrealDB before 3.1.0 Denial of Service via malformed RPC use CVSS 4.0HIGH 8.7
See all 76 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences