How severe is CVE-2026-1519?

CVE-2026-1519 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 none, and availability high.

Is CVE-2026-1519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1519?

CVE-2026-1519 affects Isc Bind. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1519?

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-2026-1519 have an EU (EUVD) identifier?

Yes. CVE-2026-1519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15406.

When was CVE-2026-1519 published?

CVE-2026-1519 was published on 2026-03-25 and last updated on 2026-07-03.

CVE-2026-1519

CVE-2026-1519 is a high-severity vulnerability in Isc Bind 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-606.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15406
Weakness: CWE-606
Affected product: Isc Bind
Published: 2026-03-25
Last modified: 2026-07-03

Description

If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.

Frequently asked questions

What is CVE-2026-1519?: If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
How severe is CVE-2026-1519?: CVE-2026-1519 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 none, and availability high.
Is CVE-2026-1519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1519?: CVE-2026-1519 affects Isc Bind. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1519?: 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-2026-1519 have an EU (EUVD) identifier?: Yes. CVE-2026-1519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15406.
When was CVE-2026-1519 published?: CVE-2026-1519 was published on 2026-03-25 and last updated on 2026-07-03.

References

Affected products (1)

cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*

More vulnerabilities in Isc Bind

CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
CVE-2001-0011 — Critical (CVSS 10.0): Buffer overflow in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
CVE-2001-0013 — Critical (CVSS 10.0): Format string vulnerability in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
CVE-2001-0010 — Critical (CVSS 10.0): Buffer overflow in transaction signature (TSIG) handling code in BIND 8 allows remote attackers to gain root privileges.
CVE-2000-1029 — Critical (CVSS 10.0): Buffer overflow in host command allows a remote attacker to execute arbitrary commands via a long response to an AXFR…
CVE-1999-0837 — Critical (CVSS 10.0): Denial of service in BIND by improperly closing TCP sessions via so_linger.

All CVEs affecting Isc Bind →

Other CWE-606 vulnerabilities

CVE-2026-27689 — High (CVSS 7.7): Due to an uncontrolled resource consumption (Denial of Service) vulnerability, an authenticated attacker with regular…
CVE-2025-43801 — High (CVSS 7.5): Unchecked input for loop condition vulnerability in XML-RPC in Liferay Portal 7.4.0 through 7.4.3.111, and older…
CVE-2024-34486 — High (CVSS 7.5): OFPPacketQueue in parser.py in Faucet SDN Ryu 4.34 allows attackers to cause a denial of service (infinite loop) via…
CVE-2024-13931 — High (CVSS 7.2): Relative Path Traversal vulnerabilities in ASPECT allow access to file resources if session administrator credentials…
CVE-2026-27145 — Medium (CVSS 6.5): (*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name…
CVE-2025-42930 — Medium (CVSS 6.5): SAP Business Planning and Consolidation allows an authenticated standard user to call a function module by crafting…

Browse all CWE-606 vulnerabilities →