CVE-2026-39822High· 7.8▾ TwilightOn Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will o…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Jul 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
0.2% → 0.2%
— → 7.8
none → high
7.8 → —
high → none
— → 7.8
none → high
Last analysed / modified upstream
On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.
go >= 1.24.0, < 1.25.12go >= 1.26.0, < 1.26.5go = 1.27Upgrade past the affected range:
go 1.26.5Affected packages:
stdlib >= 1.27.0-0, < 1.27.0-rc.2Patched in:
stdlib 1.27.0-rc.2Source: https://osv.dev/vulnerability/GO-2026-4970
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-42505Medium· 5.3Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.
CVE-2026-27137High· 7.5When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the l…
CVE-2026-33810High· 8.2When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint
CVE-2026-39819Medium· 4.4cmd/go: golang: Go 'go bug' command: Arbitrary file overwrite via symlink attack (CVE-2026-39819)
CVE-2026-33814High· 7.5When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
CVE-2026-42499High· 7.5Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.