How severe is CVE-2026-44498?

CVE-2026-44498 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-44498 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44498?

CVE-2026-44498 affects Zfnd Zebrad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44498?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44498 have an EU (EUVD) identifier?

Yes. CVE-2026-44498 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28783.

When was CVE-2026-44498 published?

CVE-2026-44498 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-44498

CVE-2026-44498 is a high-severity vulnerability in Zfnd Zebrad with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-682.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28783
Weakness: CWE-682
Affected product: Zfnd Zebrad
Published: 2026-05-08
Last modified: 2026-06-17

Description

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.

Frequently asked questions

What is CVE-2026-44498?: ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.
How severe is CVE-2026-44498?: CVE-2026-44498 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-44498 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44498?: CVE-2026-44498 affects Zfnd Zebrad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44498?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44498 have an EU (EUVD) identifier?: Yes. CVE-2026-44498 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28783.
When was CVE-2026-44498 published?: CVE-2026-44498 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:*

More vulnerabilities in Zfnd Zebrad

CVE-2026-44497 — Critical (CVSS 9.1): ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0 and prior to zebra-script version 6.0.0,…
CVE-2026-41583 — Critical (CVSS 9.1): ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-script version 5.0.2,…
CVE-2026-40880 — High (CVSS 8.1): ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and zebra-consensus version 5.0.2, a…
CVE-2026-41584 — High (CVSS 7.5): ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-chain version 6.0.2,…
CVE-2026-40881 — High (CVSS 7.5): ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when…
CVE-2026-41585 — Medium (CVSS 6.5): ZEBRA is a Zcash node written entirely in Rust. From zebrad versions 2.2.0 to before 4.3.1 and from zebra-rpc versions…

All CVEs affecting Zfnd Zebrad →

Other CWE-682 vulnerabilities

CVE-2023-2163 — Critical (CVSS 10.0): Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe,…
CVE-2026-1229 — Critical (CVSS 9.8): The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific…
CVE-2024-36736 — Critical (CVSS 9.8): An issue in the oneflow.permute component of OneFlow-Inc. Oneflow v0.9.1 causes an incorrect calculation when the same…
CVE-2022-30600 — Critical (CVSS 9.8): A flaw was found in moodle where logic used to count failed login attempts could result in the account lockout…
CVE-2021-44847 — Critical (CVSS 9.8): A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through…
CVE-2020-0221 — Critical (CVSS 9.8): Airbrush FW's scratch memory allocator is susceptible to numeric overflow. When the overflow occurs, the next…

Browse all CWE-682 vulnerabilities →