EUVD-2026-76997
GHSA-pjx8-ww25-pcf8
Severity by source
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
Low-privilege authenticated database access required to write rules tables; no confidentiality or integrity impact; crash causes high availability loss cluster-wide.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
PostGIS address_standardizer through 3.7.0 fails to validate the Weight parameter from caller-supplied rules tables before using it as an array index. Attackers can craft malicious rule rows with out-of-range Weight values to trigger out-of-bounds reads in the load_value array, causing the PostgreSQL backend process to crash and terminate all cluster sessions.
AnalysisAI
Out-of-bounds read in PostGIS address_standardizer through 3.7.0 allows authenticated database users to crash the entire PostgreSQL cluster by supplying rule rows with out-of-range Weight values. The Weight field is consumed directly as an array index into the load_value array inside rules_add_rule() (src/gamma.c:338) without any bounds validation, so a Weight of -1 or >= NUMBER_OF_WEIGHTS triggers an OOB read that terminates the PostgreSQL backend process and drops all active cluster sessions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) the address_standardizer PostgreSQL extension is installed and in use; (2) the attacker holds a database account with INSERT or UPDATE privileges on the rules tables consumed by address_standardizer; (3) address_standardizer processes the tampered rules table at some point after the malicious row is inserted. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N, score 7.1) accurately captures the impact: a low-privileged but authenticated network attacker achieves high availability impact with no confidentiality or integrity consequence. … 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 | Upstream fix available via PR #6 (https://github.com/postgis/address_standardizer/pull/6) and commits a5cb4b1360a040973092f13b1af97a718e7e104a and e987949e0fccff6a0e7a6d3f86814d5c7a01f481, targeting version 3.7.1; a tagged release version has not been independently confirmed at time of analysis, so monitor the upstream repository for the 3.7.1 release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all PostgreSQL instances running PostGIS address_standardizer versions through 3.7.0 and assess which rule-table operations are restricted to trusted administrators. …
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External POC / Exploit Code
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