# CVE-2026-78061: vas3k TaxHacker Email Sync imap-client.ts buildImapConfig server-side request forgery

> Remote attackers can exploit SSRF in TaxHacker's email sync by manipulating IMAP host/port arguments, potentially accessing internal resources.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-hrrq-qh5p-23c2

## What is CVE-2026-78061?

CVE-2026-78061 is a medium-severity server-side request forgery vulnerability in vas3k TaxHacker, published on 23 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was determined in vas3k TaxHacker up to 0.8.2. Impacted is the function buildImapConfig of the file lib/email-sync/imap-client.ts of the component Email Sync. Executing a manipulation of the argument host/port can lead to server-side request forgery. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-78061?


## How do I fix CVE-2026-78061?

No fix has been published for CVE-2026-78061 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78061 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78061 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78061 and fix it if it is affected.

What it is: CVE-2026-78061 is a medium-severity server-side request forgery vulnerability in vas3k TaxHacker, published on 23 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78061 exists.

Affected product: vas3k TaxHacker. 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-2026-78061/ (Markdown: https://insights.sbomify.com/CVE-2026-78061/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78061
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78061
- OSV: https://osv.dev/vulnerability/CVE-2026-78061

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78061/
Summaries are generated and may contain mistakes; the official description above is the record.