Xorbitsai Xoscar: attackers can run their own code
OFFICIAL NAME: Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool
DO THIS FIRSTFind out if you use it. If you do, apply the vendor's fix. Not sure if you use it? Send this page to your IT provider or security lead and ask.
TECHNICAL SUMMARY Xorbits Xoscar through 0.11.2 contains an unauthenticated deserialization vulnerability that allows remote attackers to execute arbitrary code by sending crafted data over the actor-pool TCP channel.
WHY THIS VERDICT One source reports attacks and the vulnerability is 28 days old. In our backtest a single early report was confirmed within 30 days about one time in twenty, so we wait for a second report or for attack attempts to be seen.
WHY IT RANKS HERE Exploitation is reported. The first report is 7 days old.
- HIGHEST CONFIRMED RUNG
- NOTHING YET
- CISA KEV
- NOT YET
- EXPLOIT CODE
- NONE KNOWN
How far has it climbed?
01 TALK
□ NO EVIDENCE YETNEWEST EVIDENCE NONE YETNo evidence yet.
SRC: NONE YET02 EXPOSED
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETWe have no source that counts exposed systems yet. Internet scan data needs a partnership we do not have. No evidence here does not mean nothing is exposed.
03 TRIED
▨ REPORTED, NOT CONFIRMEDNEWEST EVIDENCE · 1 SOURCEAttacks that worked are reported (step 4), so attempts count as reported too.
04 EXPLOITED
▨ REPORTED, NOT CONFIRMEDNEWEST EVIDENCE · 1 SOURCEExploitation of CVE-2026-49950 reported (CIRCL sighting).
05 DAMAGE
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETBreach notices and filings rarely name the flaw that was used, so we cannot link them to this event yet. No evidence here does not mean no harm.
When each thing happened
- DISCLOSED
- EXPLOIT CODE PUBLICNOT YET
- FIRST ATTACK REPORT
- CISA KEV LISTINGNOT YET
- US FEDERAL DEADLINENOT YET
Questions to ask this week
- Do we run Xorbitsai Xoscar? If yes, is it patched or cut off from the internet?
- Who owns fixing it, and by what date?
- Have we checked for signs of attack since the first report, not just since the patch?
How it unfolded
- Attack activity. NOV 4, 2026Exploitation of CVE-2026-49950 reported (CIRCL sighting)