CockroachDB PostgreSQL for IBM VPC is affected by multiple vulnerabilities
- Exploited
- No known exploitation
- Fix
- Fixed in 25.2.20, 25.4.12, 26.2.3
- Who is exposed
- Specific setups only
Do first: Upgrade to a fixed version: 25.2.20, 25.4.12, 26.2.3.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 12/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
CockroachDB PostgreSQL for IBM VPC is affected by a flaw that lets a local user with low-level login access escalate their privileges through a user-defined function. The attacker must already have an account on the system, and no user action is needed.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original 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 privilege escalation via user-defined function.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure5/25Specific setups only
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.1/10CVSS 7.1
- No patch0/5No signal
What would change the score
- Would score about 62 if added to CISA KEV
- Would score about 57 if CISA's SSVC rates exploitation active
- Would score about 22 if CISA's SSVC rates it automatable
What to do
Upgrade to a fixed version: 25.2.20, 25.4.12, 26.2.3.
Timeline
- CVE published
- Record last updated
- First seen by cve.now
Affected versions
- 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
Evidence 1
- Patch
Corrections
None so far.
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Questions about CVE-2026-18893
Is CVE-2026-18893 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: cve.now feed data
What does this mean?
A flaw in user-defined functions allows privilege escalation, which can give a user access beyond what they were granted. The CVSS vector rates the impact to confidentiality and integrity as high.Source: ibm.com
Which versions are affected by CVE-2026-18893?
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: cve.now feed data
Am I affected, and how do I check?
Versions 25.2.0 through 25.2.20, 25.4.0 through 25.4.12, and 26.2.0 through 26.2.3 are affected. Check the CockroachDB version the deployment runs against these ranges.Source: ibm.com
How do I fix CVE-2026-18893?
Upgrade to CockroachDB 25.2.20, 25.4.12, or 26.2.3, using the fixed release on the same release line as the installed version.Source: ibm.com