CVE-2026-85787

HIGH 7.1 ALL-YEARS

Published 2026-09-04 · Last modified 2026-09-08 · AMZN · NVD: Awaiting Analysis

An incomplete list of disallowed inputs in the SQL validation component in Amazon awslabs postgres-mcp-server before version 1.1.7 might allow an unauthenticated actor to modify data beyond the read-only scope by placing crafted SQL into the content that is submitted when an authenticated user interacts with the MCP server. To remediate this issue, users should upgrade to version 1.1.7 or above.

ELEVATED IMPACT

Severe if exploited (CVSS 7.1), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 27th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

7.1CVSS 4.0 · HIGH · CNA

ConfidentialityNone
IntegrityHigh
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
⚠User interaction: Succeeds with passive user activity
✓Complexity: No special conditions — reliably repeatable
✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Affected

Vendors Amazon

Products Postgres Mcp Server

Weakness (CWE)

CWE-184: Incomplete list of disallowed inputs

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References and research data (JSON)

All CVSS metrics

HIGH 7.1 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
MEDIUM 6.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
HIGH 7.1 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/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
MEDIUM 6.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References

Patches & mitigations

https://pypi.org/project/awslabs.postgres-mcp-server/1.1.7/ patchrelease-notesCVE record · AMZN · Updated 2026-09-04T20:03:58.194Z
NVD · CVE-2026-85787 · Updated 2026-09-08T16:18:19.520

Advisories

https://aws.amazon.com/security/security-bulletins/2026-101-aws/ vendor-advisoryCVE record · AMZN · Updated 2026-09-04T20:03:58.194Z
NVD · CVE-2026-85787 · Updated 2026-09-08T16:18:19.520
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-71748 ADVISORYEUVD · EUVD-2026-71748

Sources: NVD · CVE.org · All sources and attribution · EPSS