Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-52731— ZEBRA: Full node denial of service via non-ASCII LongPollId in getblocktemplate

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProductVersion RangeStatus
ZcashFoundationzebra< 4.5.0affected
ZcashFoundationzebra-rpc< 8.0.0affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-52731

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ZEBRA: Full node denial of service via non-ASCII LongPollId in getblocktemplate
Source: CVE Program / CVE List V5
Vulnerability Description
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an attacker authenticated to an enabled Zebra RPC endpoint can terminate zebrad by supplying a getblocktemplate LongPollId containing multi-byte UTF-8 characters. In zebra-rpc/src/methods/types/long_poll.rs, LongPollId::from_str originally checked the input byte length and then sliced fixed byte ranges to parse encoded fields. A slice boundary can land inside a multi-byte character and trigger Rust's byte index is not a char boundary panic. Zebra release builds use panic equals abort, so one malformed authenticated RPC request terminates the entire node process and can be repeated after restart. This issue is fixed in version 4.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
ZcashFoundationzebra < 4.5.0 -
ZcashFoundationzebra-rpc < 8.0.0 -

II. Public POCs for CVE-2026-52731

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-52731

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-52731 (1)

Vendor Pages for CVE-2026-52731 (1)

Same Patch Batch · ZcashFoundation · 2026-08-18 · 10 CVEs total

CVE-2026-527359.3 CRITICALZEBRA: Consensus divergence via P2SH sigop undercount in pure-Rust disabled-opcode parser
CVE-2026-527368.7 HIGHZEBRA: Block suppression via NU5 same-header body poisoning of sent-hash cache
CVE-2026-528297.5 HIGHZEBRA: IPv4-Mapped Mempool Misbehavior Update Aborts Zebra Address Book
CVE-2026-527386.9 MEDIUMZEBRA: Finalized address balance credit-first overflow on consensus-valid blocks
CVE-2026-527336.5 MEDIUMZEBRA: Persistent on-disk corruption of Sapling/Orchard subtree roots after chain fork via
CVE-2026-527395.9 MEDIUMZEBRA: Repeated Non-Finalized Shielded Transaction Aborts Zebra Before Duplicate-Nullifier
CVE-2026-527375.3 MEDIUMZEBRA: Sync restart poisoning from single unauthenticated peer via above-lookahead block
CVE-2026-527325.3 MEDIUMZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation
CVE-2026-527345.3 MEDIUMZEBRA: Unbounded memory leak in mempool download pipeline via timeout path cancel_handles

IV. Related Vulnerabilities

Same product: zebra
Same vendor: ZcashFoundation
Same weakness: CWE-248

V. Comments for CVE-2026-52731

No comments yet

Leave a comment