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NVD / CVE Program· CNA openjs

CVE-2026-85008: undici vulnerable to caching and replay of unsafe HTTP method responses

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • 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: 0.11% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: undici undici 7.29.1, 8.10.2.

Low priority for now. Upgrade to undici undici 7.29.1, 8.10.2 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

undici's cache interceptor documents that only safe HTTP methods are cached, but its logic to skip caching is built by subtracting the configured methods from the set of safe methods, so an unsafe method such as POST, PUT, or DELETE is never placed in the skip list and instead falls through to the full cache-read path. The response-storage gate also lacked a method check, so a response to an unsafe request that is heuristically cacheable or carries an explicit Cache-Control directive is stored and later replayed from cache. Because response headers from a remote origin are untrusted, an origin can answer once with a cacheable status and then have the client's own subsequent state-changing requests to that path served from the stale cache entry without ever reaching the origin, an integrity failure that occurs under the interceptor's default configuration. This affects undici versions from 7.0.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2.

Published
Sep 4, 2026
Updated
Sep 15, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · openjs
3.7
1.6 point gap

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-85008

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
nodejsundici

Versions reported by the vendor

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

  • undici undici

    • 7.29.1, 8.10.2not affected
    • 7.0.0 and later · before 7.29.1affected · semver
    • 8.0.0 and later · before 8.10.2affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • nodejs undici7.0.0 and later · before 7.29.1
  • nodejs undici8.0.0 and later · before 8.10.2

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12node-undicifrom 0—
Debian:14node-undicibefore 8.10.2+dfsg+~cs3.2.2-18.10.2+dfsg+~cs3.2.2-1
npmundicifrom 7.0.0 · before 7.29.17.29.1
npmundicifrom 8.0.0 · before 8.10.28.10.2
openSUSE:Leap 16.0pi-coding-agentbefore 1.0.4-bp160.1.11.0.4-bp160.1.1
Red Hat:hummingbird:1grafana12.4before 0:12.4.10-0.2.hum10:12.4.10-0.2.hum1
Red Hat:hummingbird:1nodejs24before 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-binbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-develbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-docsbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-full-i18nbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-libsbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs24-npmbefore 0:11.16.0-1.24.18.1.0.2.2.hum10:11.16.0-1.24.18.1.0.2.2.hum1
Red Hat:hummingbird:1nodejs24-npm-binbefore 0:24.18.1-0.2.2.hum10:24.18.1-0.2.2.hum1
Red Hat:hummingbird:1nodejs26before 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-binbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-develbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-docsbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-full-i18nbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-libsbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1nodejs26-npmbefore 0:11.19.0-1.26.7.0.1.5.2.hum10:11.19.0-1.26.7.0.1.5.2.hum1
Red Hat:hummingbird:1nodejs26-npm-binbefore 0:26.7.0-1.5.2.hum10:26.7.0-1.5.2.hum1
Red Hat:hummingbird:1v8-14.6-develbefore 0:14.6.202.34-1.26.7.0.1.5.2.hum10:14.6.202.34-1.26.7.0.1.5.2.hum1

Same product

nodejs: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-35949`undici.request` vulnerable to SSRF using absolute URL on `pathname`
    40Plan
  • CVE-2026-1525undici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
    39Monitor
  • CVE-2026-109829undici vulnerable to cache poisoning and cross-user disclosure via cross-origin redirects
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-84947Sep 4, 2026 · undici vulnerable to response truncation via oversized chunked responses in the dump interceptor
    21Monitor
  • ← EarlierCVE-2026-84961Sep 4, 2026 · undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool
    36Monitor
  • Later →CVE-2026-85014Sep 4, 2026 · undici vulnerable to Denial of Service via WebSocketStream unclean close
    30Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
undici undici7.29.1Vendor (CNA)
undici undici8.10.2Vendor (CNA)
debian:node-undici8.10.2+dfsg+~cs3.2.2-1 · Debian:14Package registry (OSV)
npm:undici7.29.1Package registry (OSV)
npm:undici8.10.2Package registry (OSV)
opensuse:pi-coding-agent1.0.4-bp160.1.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:grafana12.40:12.4.10-0.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs240:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-bin0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-devel0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-docs0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-full-i18n0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-libs0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-npm0:11.16.0-1.24.18.1.0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-npm-bin0:24.18.1-0.2.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs260:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-bin0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-devel0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-docs0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-full-i18n0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-libs0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-npm0:11.19.0-1.26.7.0.1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs26-npm-bin0:26.7.0-1.5.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:v8-14.6-devel0:14.6.202.34-1.26.7.0.1.5.2.hum1 · Red Hat:hummingbird:1Package 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.

No dated events beyond publication.

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.

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: patch commit or PR link · variant or chain candidate.

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.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-345 · Insufficient Verification of Data Authenticity

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd-primary

Attack context

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

References

Show all references (1 more)

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

All records