# CVE-2026-107828: Jivejdon through 5.0 Predictable Passwords via Sina Weibo OAuth Login

> Attackers can bypass authentication and take over accounts by deriving predictable passwords from public Weibo IDs in Jivejdon.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 9 Oct 2026
- **Also known as:** GHSA-x2f9-rf6f-hf58

## What is CVE-2026-107828?

CVE-2026-107828 is a medium-severity authentication bypass vulnerability in banq jivejdon, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Jivejdon through 5.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to access Weibo-created accounts by deriving predictable credentials from public Weibo user IDs. OAuthAccountServiceImp.transferSina() sets the password to the first four digits of the Weibo ID, letting attackers log in through normal form login to read or post as victims.

Weakness: CWE-1391 (Use of Weak Credentials)

## Which versions are affected by CVE-2026-107828?


## How do I fix CVE-2026-107828?

No fix has been published for CVE-2026-107828 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-107828 being exploited?

There is no known exploitation of CVE-2026-107828 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-107828 and fix it if it is affected.

What it is: CVE-2026-107828 is a medium-severity authentication bypass vulnerability in banq jivejdon, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-107828 in the wild and no public exploit code.

Affected product: banq jivejdon. 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-2026-107828/ (Markdown: https://insights.sbomify.com/CVE-2026-107828/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-107828
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-107828
- OSV: https://osv.dev/vulnerability/CVE-2026-107828

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-107828/
Summaries are generated and may contain mistakes; the official description above is the record.