CVE-2026-102577

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 4.3 from GitHub Security Advisory published 2026-09-30. A secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-89716 (ENISA EUVD) · GHSA-29qm-g73m-2r7h (GitHub Security Advisories)Source: ENISA EUVD

4.3EG
EchelonGraph verdictMonitorNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL downloader's host-blocking logic allows an authenticated remote user to bypass blocked-host restrictions. By supplying a crafted URL, an attacker can induce the server to make requests to restricted destinations, leading to Server-Side Request Forgery (SSRF).

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.2%
EPSS %ILE
15th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 30, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Sep 30, 2026
Fix referenced — no release confirmed yet. Sources: redhat.
Red Hat

2543604 – (CVE-2026-102577) CVE-2026-102577 moodle: SSRF risk in URL downloader via IPv4-mapped IPv6 address bypass

https://bugzilla.redhat.com/show_bug.cgi?id=2543604
Red HatMentions a patch (unverified)

CVE-2026-102577 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-102577

Vendor Advisories for CVE-2026-102577(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 52× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  5. 2026-10-30 09:32 UTCEG score recompute
  6. 2026-10-30 09:32 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  12. 2026-10-25 14:56 UTCEG score recompute
  13. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  15. 2026-10-23 09:28 UTCEG score recompute
  16. 2026-10-23 09:28 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  18. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-10-18 05:10 UTCEG score recompute
  23. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
Show 43 more
  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-12 16:41 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-11 19:14 UTCEG score recompute
  6. 2026-10-11 19:14 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  7. 2026-10-11 18:28 UTCEG score recompute
  8. 2026-10-11 15:02 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-10 18:48 UTCEG score recompute
  12. 2026-10-10 18:47 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  13. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-09 18:21 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  15. 2026-10-08 17:54 UTCEG score recompute
  16. 2026-10-08 17:54 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  17. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-07 17:28 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  20. 2026-10-06 16:35 UTCEG score recompute
  21. 2026-10-06 16:35 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  22. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-10-05 16:10 UTCEG score recompute
  25. 2026-10-05 16:09 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  26. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-10-04 15:39 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  28. 2026-10-03 15:13 UTCEG score recompute
  29. 2026-10-03 15:13 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  30. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-10-02 14:47 UTCEG score recompute
  32. 2026-10-02 14:47 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  33. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  34. 2026-10-01 14:22 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  35. 2026-09-30 16:24 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  36. 2026-09-30 15:38 UTCEG score recompute
  37. 2026-09-30 15:38 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  38. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  39. 2026-09-30 14:53 UTCEG score recompute
  40. 2026-09-30 14:53 UTCGHSA enrichmentGHSA-29qm-g73m-2r7h · GitHub CVSS 4.3
  41. 2026-09-30 09:25 UTCEG score recompute
  42. 2026-09-30 08:49 UTCEG score recomputeFirst assessed: 4.3 MEDIUM
  43. 2026-09-30 08:48 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-102577?
CVE-2026-102577 is a medium-severity vulnerability; its CVE record was published on September 30, 2026. A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL downloader's host-blocking logic allows an authenticated remote user to bypass blocked-host restrictions. By supplying a crafted URL, an attacker can induce the server to make requests to restricted…
When was CVE-2026-102577 made public?
CVE-2026-102577 was made public on September 29, 2026: that is the date its CVE record's CNA, Fedora Project, gives for when the vulnerability was made public. The CVE record itself was published on September 30, 2026. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-102577 actively exploited?
CVE-2026-102577 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102577?
CVE-2026-102577 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-102577?
A fix for CVE-2026-102577 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-102577 are linked in the Vendor Advisories panel on this page.

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