CVE-2026-61820

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, inherit_template_properties() manually surrounds primary-key column names from pg_attribute.attname with double quotes without escaping embedded double-quote characters. A partman_user who owns a template table can create a crafted column name that breaks out of the generated ALTER TABLE ADD PRIMARY KEY identifier when the background worker applies the key to a child partition. The generated SQL then executes with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, permitting database-wide compromise and operating-system command execution as the PostgreSQL service account. The crafted catalog identifier persists until removed and can trigger again during later partition creation. This issue is fixed in version 5.5.0.

CVSS v3
8.5
EG Score
8.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity85% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Sep 18, 2026
Patch available. Sources: github, github_release.
github_release Patch Available

v5.5.0

Patch available: pgpartman/pg_partman v5.5.0

https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0
github Patch Available

pg_partman privilege escalation via SQL injection when inheriting template properties · Advisory · pgpartman/pg_partman · GitHub

https://github.com/pgpartman/pg_partman/security/advisories/GHSA-xqxh-6hh3-974m

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 18:01 UTCEG score recompute
  2. 2026-09-23 18:40 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 16:23 UTCEG score recompute
  5. 2026-09-22 15:46 UTCEG score recompute
  6. 2026-09-22 05:04 UTCEG score recompute
  7. 2026-09-21 06:02 UTCEG score recompute
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-19 19:31 UTCEG score recompute
  10. 2026-09-18 20:30 UTCEG score recompute
  11. 2026-09-18 19:54 UTCEG score recompute
  12. 2026-09-18 19:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-61820?
CVE-2026-61820 is a high vulnerability published on September 18, 2026. pgpartman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, inherittemplateproperties() manually surrounds primary-key column names from pgattribute.attname with double quotes without escaping embedded double-quote characters. A partmanuser who owns a template…
When was CVE-2026-61820 disclosed?
CVE-2026-61820 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61820 actively exploited?
CVE-2026-61820 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.8% of all scored CVEs.
What is the CVSS score of CVE-2026-61820?
CVE-2026-61820 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-61820?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61820, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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