CVE-2026-56858High· 8.1▾ TwilightFix Javascript regexp context tracking in html/template
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.2%
0.2% → 0.3%
8.1 → —
high → none
— → 8.1
none → high
8.1 → —
high → none
— → 8.1
none → high
8.1 → —
high → none
— → 8.1
none → high
Last analysed / modified upstream
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
stdlib >= 1.27.0-0, < 1.27.0-rc.3Upgrade to a patched release:
stdlib 1.27.0-rc.3Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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