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CVE-2026-77136 is a server-side template injection vulnerability in the TYPO3 Powermail extension. A form-field value configured as the sender name is passed directly to a Fluid View and rendered as template source without sanitization. An unauthenticated attacker can submit Fluid template syntax in the affected field, causing arbitrary Fluid ViewHelpers to be evaluated. Affected versions are Powermail versions before 10.9.3, versions 11.0.0 through before 12.6.1, and versions 13.0.0 through before 13.2.1.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.