# CVE-2026-50735: Information disclosure in pglogical

> A malicious publisher can cause out-of-bounds reads in pglogical subscribers, leaking memory or crashing workers, primarily affecting managed deployments with delegated subscription privileges.

- **Severity:** Medium 6.1 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 28 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-50735, ECHO-adab-4650-fa5e, GHSA-jhwv-w4qj-9cmf, UBUNTU-CVE-2026-50735

## What is CVE-2026-50735?

CVE-2026-50735 is a medium-severity vulnerability in EnterpriseDB pglogical, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

pglogical's apply worker does not sufficiently validate the length of certain fields in incoming replication protocol messages before copying them, resulting in an out-of-bounds read. A party acting as the publisher for a subscription, for example a non-PostgreSQL endpoint that speaks the pglogical replication protocol, can return crafted messages that cause the subscriber's apply worker to read beyond the bounds of an allocated buffer, disclosing adjacent process memory or crashing the worker. To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-50735?

It affects 1 product.


Products: Enterprisedb Pglogical.

## How do I fix CVE-2026-50735?

Apply the vendor's patch.

## Is CVE-2026-50735 being exploited?

There is no known exploitation of CVE-2026-50735 in the wild and no public exploit code.

## Other vulnerabilities in EnterpriseDB pglogical

- [CVE-2026-50736](https://insights.sbomify.com/CVE-2026-50736/): SQL injection in pglogical (critical 9.0)
- [CVE-2026-50737](https://insights.sbomify.com/CVE-2026-50737/): Privilege escalation in pglogical (critical 9.0)
- [CVE-2026-50738](https://insights.sbomify.com/CVE-2026-50738/): Use after free in pglogical (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-50735 and fix it if it is affected.

What it is: CVE-2026-50735 is a medium-severity vulnerability in EnterpriseDB pglogical, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-50735 in the wild and no public exploit code.

Affected product: EnterpriseDB pglogical. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-50735/ (Markdown: https://insights.sbomify.com/CVE-2026-50735/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-50735
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-50735
- OSV: https://osv.dev/vulnerability/CVE-2026-50735

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-50735/
Summaries are generated and may contain mistakes; the official description above is the record.