I was looking at the Intertext data for Hebrews 1:3 and was surprised to see that Wisdom of Solomon 7:26 was not listed. Many commentators note that Heb 1:3's usage of the word ἀπαύγασμα (radiance, reflection) is similar to the usage in Wisdom 7:26.
The Eerdmans Commentary on the Bible says this:
[quote]Christ’s role and rank as representative of God also draws on OT and Jewish traditions concerning Wisdom and the Word as agents of God. “The hymn is a striking expression of Wisdom Christology.… In Heb 1:1–3 and Col 1:15–17 we have a way of speaking about Christ in Wisdom terms” (Dunn 1980: 206, 207). In the OT Wisdom is “beside God like a master-worker” (Prov 8:30) as God “created the worlds.” Further in the Hellenistic Jewish book of Wisdom, Wisdom is described in terms which occur only here in the LXX but which are taken up in Heb 1:3: Wisdom is God’s creative agent in shaping the cosmos and as such acts as a “reflection” or “radiance” (Gk. apaugasma) of God (Wis 7:26; cf. Wis 7:21–27 and 9:2). The image suggests a channel of effects, like the warming of the earth by the sun through its rays. NT writers (esp. John 1:1–3; 1 Cor 8:6; Col 1:16, 17; Heb 1:1–3) apply this distinction between source of creation (usually Gk. ek, “from,” with the genitive) to God the Father, and agency of creation (usually, as here, Gk. dia, “through,” with the genitive) to Christ.
Anthony C. Thiselton, “Hebrews,” in Eerdmans Commentary on the Bible, ed. James D. G. Dunn and John W. Rogerson (Grand Rapids, MI; Cambridge, U.K.: William B. Eerdmans Publishing Company, 2003), 1455.
Heb 1:2 mentions that the Son is the one "through whom [God] also created the worlds," which is a similar idea to that communicated in Wisdom 7:21, where Wisdom is said to be "the fashioner of all things."
Shouldn't Heb 1:3 at least be considered an Echo of Wisdom 7:26 even if not a direct Allusion? I'd love to see this connection added to the Intertext (NT use of OT) dataset.