Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0034, the 27th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 26 Oct 2026, 20:35 UTC Confirmed by the CVE List
2. 26 Oct 2026, 21:18 UTC Confirmed by NVD
3. 31 Oct 2026, 13:32 UTC First seen by agentprime
4. 31 Oct 2026, 13:32 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-7rv5-mrxv-xcr9
• OSV: GHSA-7rv5-mrxv-xcr9
• github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9
• nvd.nist.gov/vuln/detail/CVE-2026-116580
• github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2
• github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d
• github.com/lxsmnsyc/seroval
• github.com/lxsmnsyc/seroval/releases/tag/[email protected]

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.