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CVE-2026-87863ModerateNetworkRevised 1 Nov

HSTS response erases persisted entries

MSRC advisory NVD CVE.org

Assessment

Severity
Moderate
CVSS base score
6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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
NoneC:N
Integrity
LowI:L
Availability
LowA:L

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:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U → CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L · CVSS score: 6.1 → 6.5
  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 (41)

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 01:45 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 revised23 Oct 2026 14:45 UTC → 28 Oct 2026 01:45 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 01:03 UTC → 23 Oct 2026 14:45 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:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U → CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  29. 24 Oct 2026 · 07:49:07 UTC CVSS base score6.1 → 6.5
  30. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  31. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  32. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  33. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  34. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  35. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  36. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  37. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  38. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  39. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  40. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  41. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-87863. 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-2026-87863

Published

HSTS response erases persisted entries

An authenticated HTTPS origin can supply an HSTS `max-age` value that the parser accepts, but time serialization later fails to process. On 64-bit systems, extreme max-age values compute an absolute expiry within standard time integer limits that exceeds calendar time structure bounds. During cache saves, the original HSTS file is truncated before writing a temporary replacement; when serialization fails, the temporary file is deleted, leaving an empty or partial cache. Because the save error is silently ignored during cleanup, curl exits successfully despite the data loss.

Source published
20 Oct 2026 20:13:22 UTC
Source modified
30 Oct 2026 12:04:02 UTC
Observed here
30 Oct 2026 13:45:33 UTC
Source terms
CVE Program Terms of Use

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