CVE-2026-66373

Summary

Redis before 8.8.0, in the unusual case where an authenticated attacker can execute RESTORE, allows remote code execution via a RESTORE payload where the same NACK (pending entry) is referenced by more than one consumer, because deleting both consumers via XGROUP DELCONSUMER leads to a double free. NOTE: this issue exists because of an incomplete fix for CVE-2026-25243.

Affected Software

Weaknesses

• CWE-415: CWE-415 Double Free

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/berabuddies/redis-poc

CVE Program Container

Additional References

• https://lists.debian.org/debian-lts-announce/2026/08/msg00012.html

References

• https://github.com/redis/redis/pull/15081
• https://github.com/redis/redis/compare/8.6.4…8.8.0
• https://x.com/Fried_rice/status/2080059356322918777
• https://github.com/berabuddies/redis-poc
• https://news.ycombinator.com/item?id=49024938

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