CVE-2026-48856

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data.

The httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary. httpc_response:redirect/2 constructs the redirected request by updating only the host field of the header record; all other fields (including authorization and proxy_authorization) are copied verbatim. The redirect target host is never compared against the original host.

autoredirect defaults to true, so this affects all httpc callers that do not explicitly disable automatic redirects.

An attacker who controls a server that the victim contacts via httpc can issue a cross-origin 3xx redirect to a server they also control. The Authorization header (including Basic credentials derived from URL userinfo via httpc_request:handle_user_info/2) is forwarded to the redirect target, allowing credential theft. The same applies to the Proxy-Authorization header.

This vulnerability is associated with program files lib/inets/src/http_client/httpc_response.erl.

This issue affects OTP from OTP 17.0 before OTP 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to inets from 5.10 before 9.7.1, 9.6.2.2 and 9.3.2.6.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
26.0%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 24, 2026

Advisory Details (5)

Auto-updated Jun 11, 2026
Patch available. Sources: github_commit, github.
generic

Versions — Erlang System Documentation v29.0.2

https://www.erlang.org/doc/system/versions.html#order-of-versions
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-48856
github Patch Available

httpc leaks Authorization header to cross-origin redirect targets · Advisory · erlang/otp · GitHub

https://github.com/erlang/otp/security/advisories/GHSA-m75x-4vwg-ggjh
github_commit

commit 688d748d6f7a (erlang/otp)

Fix landed in erlang/otp commit 688d748d6f7a — awaiting tagged release

https://github.com/erlang/otp/commit/688d748d6f7a6a06b13b662a1d3de8af97079612
generic

httpc leaks Authorization header to cross-origin redirect targets | Erlang Ecosystem Foundation CNA

https://cna.erlef.org/cves/CVE-2026-48856.html

Vendor Advisories for CVE-2026-48856(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 10× in last 7d / 54× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-24 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:18 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:25 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-16 23:33 UTCVendor advisory
  12. 2026-07-16 17:03 UTCEPSS rescore
  13. 2026-07-15 22:15 UTCVendor advisory
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-14 22:40 UTCVendor advisory
  17. 2026-07-13 22:30 UTCEPSS rescore
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 00:31 UTCVendor advisory
  20. 2026-07-12 05:46 UTCEPSS rescore
  21. 2026-07-11 19:50 UTCVendor advisory
  22. 2026-07-11 08:27 UTCEPSS rescore
  23. 2026-07-10 21:11 UTCVendor advisory
  24. 2026-07-09 22:32 UTCVendor advisory
  25. 2026-07-09 19:10 UTCEPSS rescore
Show 60 more
  1. 2026-07-08 20:53 UTCVendor advisory
  2. 2026-07-08 15:16 UTCEPSS rescore
  3. 2026-07-07 21:57 UTCVendor advisory
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 11:12 UTCVendor advisory
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 11:48 UTCVendor advisory
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 08:01 UTCVendor advisory
  12. 2026-07-02 06:13 UTCVendor advisory
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-07-01 07:31 UTCVendor advisory
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-30 08:53 UTCVendor advisory
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 10:14 UTCVendor advisory
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 11:35 UTCVendor advisory
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-27 12:57 UTCVendor advisory
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-26 14:19 UTCVendor advisory
  27. 2026-06-25 15:19 UTCVendor advisory
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-24 16:39 UTCVendor advisory
  30. 2026-06-24 14:05 UTCEPSS rescore
  31. 2026-06-23 21:33 UTCEPSS rescore
  32. 2026-06-23 21:33 UTCEPSS rescore
  33. 2026-06-23 17:59 UTCVendor advisory
  34. 2026-06-22 19:21 UTCVendor advisory
  35. 2026-06-22 14:25 UTCEPSS rescore
  36. 2026-06-22 14:25 UTCEPSS rescore
  37. 2026-06-21 20:31 UTCVendor advisory
  38. 2026-06-21 14:56 UTCEPSS rescore
  39. 2026-06-21 14:56 UTCEPSS rescore
  40. 2026-06-21 01:59 UTCEPSS rescore
  41. 2026-06-21 01:59 UTCEPSS rescore
  42. 2026-06-20 21:51 UTCVendor advisory
  43. 2026-06-19 23:12 UTCVendor advisory
  44. 2026-06-19 19:26 UTCEPSS rescore
  45. 2026-06-19 19:26 UTCEPSS rescore
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-17 17:53 UTCEPSS rescore
  49. 2026-06-16 17:53 UTCEPSS rescore
  50. 2026-06-16 04:39 UTCEG score recompute▼ 0.60
  51. 2026-06-15 19:45 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  52. 2026-06-15 17:49 UTCEPSS rescore
  53. 2026-06-15 17:49 UTCEPSS rescore
  54. 2026-06-14 23:18 UTCEPSS rescore
  55. 2026-06-13 23:00 UTCEPSS rescore
  56. 2026-06-12 23:12 UTCEPSS rescore
  57. 2026-06-12 23:12 UTCEPSS rescore
  58. 2026-06-11 14:00 UTCEPSS rescore
  59. 2026-06-10 17:18 UTCEG score recompute
  60. 2026-06-10 17:18 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-48856?
CVE-2026-48856 is a medium vulnerability published on June 10, 2026. Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data. The httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary.…
When was CVE-2026-48856 disclosed?
CVE-2026-48856 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48856 actively exploited?
CVE-2026-48856 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48856?
CVE-2026-48856 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-48856?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48856, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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