TI-2026-63193 Aliases CVE-2026-93853 GHSA-hjpg-q85j-gwxx

Barman snapshot backup deletion trusts unverified backup catalog metadata

LOW 31CWE-283Published 2026-09-29 · Updated 2026-09-30

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Unverified ownership in Barman snapshot backup deletion allows a principal who can write the backup catalog to cause Barman to delete unrelated cloud snapshots. When a snapshot backup is deleted, either explicitly or by retention policy enforcement, Barman reads the snapshot identifiers from the backup.info file and passes them to the cloud provider's delete API using Barman's own credentials, without verifying that the snapshots belong to that backup. An attacker who can overwrite backup.info but lacks snapshot delete permissions can substitute the identifiers of other snapshots, causing Barman to delete any snapshot its cloud identity can reach on AWS, Microsoft Azure, or Google Cloud. Exploitation requires a deployment where the principal that writes the backup catalog is separate from the identity Barman uses to delete snapshots. Barman versions from 3.4.0 (Google Cloud), 3.6.0 (Azure), and 3.7.0 (AWS) up to and including 3.20.0 are affected. The issue is fixed in Barman 3.20.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00207 10th percentileScored 2026-11-07

Fix Fixed Barman (EnterpriseDB): 3.20.1

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

Vendor	Product	Affected versions	Fixed in	Status	Source
EnterpriseDB	Barman	3.4.0 to before 3.20.1	3.20.1	Patch available	CNA

Barman VendorEnterpriseDB Affected 3.4.0 to before 3.20.1 Fixed in 3.20.1 Patch available CNA

Remediation

Fix · CNA Barman (EnterpriseDB) Fixed in 3.20.1

Timeline

2026-10-02 Threatist record created from CVE-2026-93853
2026-10-03 Alias added: GHSA-hjpg-q85j-gwxx

References

Other 1

https://www.enterprisedb.com/docs/security/advisories/cve202693853/

TI-2023-21738 An issue was discovered in EnterpriseDB Postgres Advanced Server (EPAS) before 11.21.32… CVSS 3.1CRITICAL 9.8
TI-2026-37400 When applying replicated changes for a row that is missing one or more columns, pglogical… CVSS 4.0CRITICAL 9.0
TI-2026-37399 SQL injection in EnterpriseDB pglogical CVSS 4.0CRITICAL 9.0
TI-2023-21739 An issue was discovered in EnterpriseDB Postgres Advanced Server (EPAS) before 11.21.32… CVSS 3.1HIGH 8.8
TI-2026-63799 WarehousePG pg_file_write/pg_file_rename/pg_file_unlink/pg_logdir_ls privilege escalation CVSS 4.0HIGH 8.7
TI-2023-21740 An issue was discovered in EnterpriseDB Postgres Advanced Server (EPAS) before 11.21.32… CVSS 3.1HIGH 8.8

See all 22 →

Sources

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