# CVE-2026-11481: yoanbernabeu grepai Postgres Embedding Cache chunker.go PostgresStore.LookupByContentHash weak hash

> Local attackers can exploit weak hashing in the Postgres embedding cache to bypass content integrity checks or access cached data.

- **Severity:** Low 2.0 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Jun 2026
- **Updated:** 8 Jun 2026
- **Also known as:** GHSA-q76h-p6jh-9rw3, GO-2026-6128

## What is CVE-2026-11481?

CVE-2026-11481 is a low-severity vulnerability in yoanbernabeu grepai, published on 8 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was determined in yoanbernabeu grepai up to 0.35.0. The affected element is the function PostgresStore.LookupByContentHash of the file indexer/chunker.go of the component Postgres Embedding Cache. Executing a manipulation of the argument content_hash can lead to use of weak hash. The attack needs to be launched locally. The attack requires a high level of complexity. The exploitability is described as difficult. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.

Weakness: CWE-328 (Use of Weak Hash), CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2026-11481?

3 open source packages ship an affected version, including github.com/yoanbernabeu/grepai.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/yoanbernabeu/grepai` | Go | All versions | None |
| `github.com/yoanbernabeu/grepai` | Go | All versions to 0.35.0 | None |
| `github.com/yoanbernabeu/grepai` | Go | All versions to 0.35.0 | None |

## How do I fix CVE-2026-11481?

Apply the vendor's patch.

## Is CVE-2026-11481 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11481 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11481 and fix it if it is affected.

What it is: CVE-2026-11481 is a low-severity vulnerability in yoanbernabeu grepai, published on 8 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11481 exists.

Affected packages and fixed versions:
- github.com/yoanbernabeu/grepai (Go): affected all versions; no fix listed
- github.com/yoanbernabeu/grepai (Go): affected all versions up to 0.35.0; no fix listed
- github.com/yoanbernabeu/grepai (Go): affected all versions up to 0.35.0; no fix listed

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-2026-11481/ (Markdown: https://insights.sbomify.com/CVE-2026-11481/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11481
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11481
- OSV: https://osv.dev/vulnerability/CVE-2026-11481

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11481/
Summaries are generated and may contain mistakes; the official description above is the record.