ChangeIntel IT change radar
Public mode

No access to your tenant or devices. Every item links to its source. What this means

Some sources, documents or advisories need attention: 275/275 feeds/APIs · 469/469 docs · 7/9 advisories · checked 00:33 UTC Customize Public modeDiscuss ChangeIntel on Discord
CVE-2026-87864ImportantNetworkRevised 1 Nov

IMAP APPEND plus CRLF conversion command injection

MSRC advisory NVD CVE.org

Assessment

Severity
Important
CVSS base score
8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U
Impact
Not stated
EPSS · 30-day forecast
No EPSS score collected
Public detection template
No Nuclei template is listed in the current collected catalog
Exploitation detected
Unknown: not stated by MSRC
Exploitability
Not assessed
Publicly disclosed
Unknown: not stated by MSRC
Customer action
Required: follow the MSRC remediation guidance
Component
Mariner
Weakness
—
Issued by
curl
Published
23 Oct 2026 · October 2026
Last revised
1 Nov 2026Information published.
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
LowC:L
Integrity
HighI:H
Availability
NoneA:N

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Open Source Software
2 affected products
  • azl3 curl 8.11.1-11 on Azure Linux 3.0
  • azl3 curl 8.11.1-12 on Azure Linux 3.0

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Affected products: azl3 curl 8.11.1-11 on Azure Linux 3.0 → azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 curl 8.11.1-12 on Azure Linux 3.0
  6. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → Unknown: not stated by MSRC · Exploitation detected: Not reported by MSRC → Unknown: not stated by MSRC
  7. Affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 curl 8.11.1-11 on Azure Linux 3.0
  8. Affected products: azl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 · CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L → CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U · CVSS score: 5.9 → 8.2 · Severity: Moderate → Important
  9. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  10. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (42)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  3. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  4. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  5. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  6. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  7. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  8. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  9. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  10. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  11. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  12. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  13. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  14. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  15. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  16. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  17. 2 Nov 2026 · 09:04:36 UTC Last revised28 Oct 2026 01:47 UTC → 1 Nov 2026 14:54 UTC
  18. 2 Nov 2026 · 09:04:36 UTC Affected productsazl3 curl 8.11.1-11 on Azure Linux 3.0 → azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 curl 8.11.1-12 on Azure Linux 3.0
  19. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  20. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  21. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  22. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → Unknown: not stated by MSRC
  23. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → Unknown: not stated by MSRC
  24. 28 Oct 2026 · 07:15:25 UTC Last revised24 Oct 2026 01:44 UTC → 28 Oct 2026 01:47 UTC
  25. 28 Oct 2026 · 07:15:25 UTC Affected productsazl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 curl 8.11.1-11 on Azure Linux 3.0
  26. 24 Oct 2026 · 07:49:07 UTC Last revised23 Oct 2026 01:06 UTC → 24 Oct 2026 01:44 UTC
  27. 24 Oct 2026 · 07:49:07 UTC Affected productsazl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0 → azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 curl 8.11.1-11 on Azure Linux 3.0, azl3 mysql 8.0.46-2 on Azure Linux 3.0, azl3 rust 1.75.0-31 on Azure Linux 3.0, azl3 rust 1.96.1-2 on Azure Linux 3.0, azl3 tensorflow 2.16.1-11 on Azure Linux 3.0
  28. 24 Oct 2026 · 07:49:07 UTC CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L → CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U
  29. 24 Oct 2026 · 07:49:07 UTC CVSS base score5.9 → 8.2
  30. 24 Oct 2026 · 07:49:07 UTC SeverityModerate → Important
  31. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  32. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  33. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  34. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  35. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  36. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  37. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  38. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  39. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  40. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  41. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  42. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-87864. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-87864

Published

IMAP APPEND plus CRLF conversion command injection

Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in the `IMAP APPEND {N}` literal while transmitting line-ending expanded data. The server reads only $N$ bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within the authenticated session.

Source published
20 Oct 2026 20:13:13 UTC
Source modified
30 Oct 2026 12:00:45 UTC
Observed here
30 Oct 2026 13:45:33 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 7 Nov 00:33 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

No accounts or analytics; your preferences stay in your browser. Information, not advice. ChangeIntel is an independent tool and is not affiliated with or endorsed by Microsoft, Apple, Google, Broadcom (VMware), Jamf, Oracle, Mozilla, or any other vendor it covers. Product names are trademarks of their owners. Built by Evotec.