CVE-2026-77131 Cleartext Transmission of Sensitive Information in extension "SYSSY - TYPO3 Monitoring & Security Checks" (syssy)
Attackers with API keys can read sensitive system information transmitted in cleartext when OpenSSL is unavailable on the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77131?
CVE-2026-77131 is a medium-severity vulnerability in Extension "SYSSY - TYPO3 Monitoring & Security Checks", published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
When OpenSSL is unavailable on the server, the extension transmits TYPO3 system information in cleartext instead of encrypting it. Exploitation requires the attacker to already be in control of the SYSSY project's API key.
Weakness: CWE-319
Which versions are affected by CVE-2026-77131?
How do I fix CVE-2026-77131?
No fix has been published for CVE-2026-77131 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-77131 being exploited?
There is no known exploitation of CVE-2026-77131 in the wild and no public exploit code.
Sources
Also known as GHSA-8j7q-247m-7f82.