# CVE-2026-18968: ttttonyhe OBlog tags.php cross site scripting

> Remote attackers can execute arbitrary scripts via the day parameter in tags.php, potentially compromising user sessions.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-h4fj-xv6r-wvv7

## What is CVE-2026-18968?

CVE-2026-18968 is a medium-severity cross-site scripting vulnerability in ttttonyhe OBlog, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A security vulnerability has been detected in ttttonyhe OBlog up to 3ca6a45a2fcc81f6086751d8af124658720e8f8f. This issue affects some unknown processing of the file /tags.php. Such manipulation of the argument day leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-18968?


## How do I fix CVE-2026-18968?

No fix has been published for CVE-2026-18968 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18968 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18968 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18968 and fix it if it is affected.

What it is: CVE-2026-18968 is a medium-severity cross-site scripting vulnerability in ttttonyhe OBlog, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18968 exists.

Affected product: ttttonyhe OBlog. 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-2026-18968/ (Markdown: https://insights.sbomify.com/CVE-2026-18968/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18968
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18968
- OSV: https://osv.dev/vulnerability/CVE-2026-18968

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18968/
Summaries are generated and may contain mistakes; the official description above is the record.