CVE.org (no NVD analysis yet)· CNA apache

CVE-2026-85088: Apache Thrift, Apache Thrift: The C++ and D clients fall back to the certificate Common Name when subjectAltName entries are present but do not match

MediumCVSS 6.9 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 27/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Apache Software Foundation Apache Thrift 0.25.0; azl3 thrift 0.24.0-1 on Azure Linux 3.0 0.25.0-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Apache Software Foundation Apache Thrift 0.25.0; azl3 thrift 0.24.0-1 on Azure Linux 3.0 0.25.0-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper Validation of Certificate with Host Mismatch in the C++ and D libraries of Apache Thrift. Both libraries install a default access manager for client sockets — TSSLSocketFactory does so in C++, and the accessManager property does so in D — which compares the peer certificate against the host name that was connected to. That comparison walks the subjectAltName dNSName entries first and consults the certificate Common Name afterwards. A name that does not match yields a "skip" result rather than a rejection, so a certificate whose subjectAltName entries are all present and all non-matching falls through to the Common Name, which can then satisfy the check. RFC 6125 section 6.4.4, and RFC 9525 section 2, require that the Common Name is not consulted when a dNSName subjectAltName is present. A certificate carrying subjectAltName entries for one name and a Common Name for another is therefore accepted for a connection to the second name. Exploitation requires an attacker positioned on the network path who holds a certificate that chains to a certificate authority in the client's trust store and whose Common Name matches the connected host name. Public certificate authorities have not issued on Common Name alone for many years, so this is principally a concern for deployments using a private or enterprise public-key infrastructure. This issue affects the C++ library of Apache Thrift from 0.7.0 through 0.24.0 and the D library from 0.9.0 through 0.24.0. Users should upgrade to 0.25.0.

Published: Oct 2, 2026
Updated: Oct 2, 2026
EPSS: 0.1% · 6th percentile
CWE: CWE-295

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 27 / 40 · 6.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · apache: 6.9; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

Apache Software Foundation Apache Thrift
- before 0.25.0affected · semver
- before 0.25.0affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	thrift	from 0	—
Red Hat:hummingbird:1	perl-thrift	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1
Red Hat:hummingbird:1	python3-thrift	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1
Red Hat:hummingbird:1	thrift	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1
Red Hat:hummingbird:1	thrift-devel	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1
Red Hat:hummingbird:1	thrift-glib	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1
Red Hat:hummingbird:1	thrift-qt	before 0:0.25.0-0.1.hum1	0:0.25.0-0.1.hum1

Same product

apache software foundation: all records

Other highest-scoring records for the same primary product.

CVE-2026-83632Apache Thrift: C++ THttpTransport grows its line buffer without bound
36Monitor
CVE-2026-91135Apache Thrift: C++ `THeaderTransport::transform()` heap buffer overflow (write direction)
36Monitor
CVE-2026-96277Apache Thrift: Ruby `SimpleServer` ends `serve()` on any non-Transport/Protocol exception
34Monitor

Published before and after this one in the same product

← EarlierCVE-2026-85086Oct 2, 2026 · Apache Thrift: Perl TLS client disables certificate verification by default
27Monitor
← EarlierCVE-2026-85087Oct 2, 2026 · Apache Thrift: Python ≥3.12 host-name check silently becomes a no-op
27Monitor
Later →CVE-2026-86535Oct 2, 2026 · Apache Thrift: A JSON member name can stall the Node server's event loop indefinitely
34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Apache Software Foundation Apache Thrift	0.25.0	Vendor (CNA)
azl3 thrift 0.24.0-1 on Azure Linux 3.0	0.25.0-1 · Release Notes	Microsoft (MSRC)
red hat:perl-thrift	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)
red hat:python3-thrift	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)
red hat:thrift	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)
red hat:thrift-devel	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)
red hat:thrift-glib	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)
red hat:thrift-qt	0:0.25.0-0.1.hum1 · Red Hat:hummingbird:1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedOct 2, 2026
Fix recordedOct 2, 2026same day
TodayNov 13, 2026+42 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Apache Thriftfinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-850860 days apartApache Thrift: Perl TLS client disables certificate verification by default
27Monitor
CVE-2026-850870 days apartApache Thrift: Python ≥3.12 host-name check silently becomes a no-op
27Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-1247 · Oct 5, 2026(Apache Thrift Güvnelik Zafiyeti)

All national notices →

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {
2  // Left empty for the test environment
3}

Fixed

kotlin

1val client = OkHttpClient.Builder()
2  .certificatePinner(
3    CertificatePinner.Builder()
4      .add("api.sirius.example", "sha256/…")
5      .build()
6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

SSVC exploitation— → noneOct 2, 2026, 7:07 PM UTC
Exploit maturity— → noneOct 2, 2026, 1:07 PM UTC
Fix✗ → ✓Oct 2, 2026, 1:07 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1

Show all references (1 more)

lists.apache.org/thread/zcgm7lx6037lvgvn87rc1tj3p0zhv371

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records